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Saurabh A, Kaur M, Khan R, Guleria G, Shandilya M, Thakur S. Foliar application of Fe 2O 3 nanofertilizer on growth and yield of cauliflower ( Brassica oleracea var. Botrytis L.) cv. Pusa Snowball K-1. Int J Phytoremediation 2024; 26:993-1002. [PMID: 38062781 DOI: 10.1080/15226514.2023.2288894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
The growth, yield, and quality of cauliflower (Brassica oleracea var. botrytis L.) cv. Pusa Snowball K-1 were studied using Fe2O3-nano fertilizer (Fe2O3-N) in combination with Azotobacter, Farmyard manure (FYM), and Phosphorus solubilizing bacteria (PSB). Hydrothermally synthesized Fe2O3 nanoparticles characterized with XRD, FTIR, and SEM. The experiment consisting 12 treatments viz. T1 (Fe2O3-N), T2 comprising of Fe2O3-N + FYM + Azotobacter + PSB, T3 (Fe2O3-N + Azotobacter + PSB), T4 (Fe2O3-N + FYM + Azotobacter), T5 (Fe2O3-N + FYM + PSB), T6 (Fe2O3-N + FYM), T7 (Fe2O3-N + Azotobacter), T8 (Fe2O3-N + PSB), T9 (PSB), T10 (Azotobacter), T11 (FYM), and T12 (control). Fe2O3 NPs positively enhance the photosynthetic activity and stimulate catalyze enzymatic action in plant leaves that effect the health of the plant and remarkably increase the crop yield. Application of Fe2O3-nano fertilizer (Fe2O3-N) along the Azotobacter, FYM, and PSB was shown encouraging growth effects to improve the cropping behavior. Fe2O3 NPs positively enhance the photosynthetic activity and stimulate catalyze enzymatic action in plant leaves that effect the health of the plant and remarkably increase the crop yield.
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Affiliation(s)
- Amit Saurabh
- Department of Horticulture, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Sirmour, H.P., India
| | - Mandeep Kaur
- Department of Horticulture, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Sirmour, H.P., India
| | - Ruksana Khan
- Department of Horticulture, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Sirmour, H.P., India
| | - Geetika Guleria
- Department of Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Sirmour, H.P., India
| | - Mamta Shandilya
- School of Physics and Materials Science, Shoolini University, Solan, H.P., India
| | - Sapna Thakur
- Department of Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Sirmour, H.P., India
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Zhao K, Zhou X, Li X, Moon J, Cassidy J, Harankahage D, Hu Z, Savoy SM, Gu Q, Zamkov M, Malko AV. Green Light from Red-Emitting Nanocrystals: Broadband, Low-Threshold Lasing from Colloidal Quantum Shells in Optical Nanocavities. ACS Nano 2024; 18:10946-10953. [PMID: 38613507 DOI: 10.1021/acsnano.4c02346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/15/2024]
Abstract
Spherical semiconductor nanoplatelets, known as quantum shells (QSs), have captured significant interest for their strong suppression of Auger recombination, which leads to long multiexciton lifetimes and wide optical gain bandwidth. Yet, the realization of benefits associated with the multiexciton lasing regime using a suitably designed photonic cavity remains elusive. Here, we demonstrate broadly tunable lasing from close-packed films of CdS/CdSe/CdS QSs deposited over nanopillar arrays on Si substrates. Wide spectral tuning of the stimulated emission in QSs with a fixed bandgap value was achieved by engaging single exciton (λX ∼ 634 nm), biexciton (λBX ∼ 627 nm), and multiple exciton (λMX ∼ 615-565 nm) transitions. The ensemble-averaged gain threshold of ∼ 2.6 electron-hole pairs per QS particle and the low photonic cavity fluence threshold of ∼4 μJ/cm2 were attributed to Auger suppression. The tuning of the lasing emission closely aligns with our model predictions achieved by varying the array period while preserving mode confinement and quality (Q) factors. These results mark a notable step toward the development of colloidal nanocrystal lasers.
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Affiliation(s)
- Kehui Zhao
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Xiaohe Zhou
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Xi Li
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jiyoung Moon
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - James Cassidy
- The Center for Photochemical Sciences and Department of Physics, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Dulanjan Harankahage
- The Center for Photochemical Sciences and Department of Physics, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Zhongjian Hu
- Nanohmics Inc., 6201 E. Oltorf, Suite 400, Austin, Texas 78741, United States
| | - Steve M Savoy
- Nanohmics Inc., 6201 E. Oltorf, Suite 400, Austin, Texas 78741, United States
| | - Qing Gu
- Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Mikhail Zamkov
- The Center for Photochemical Sciences and Department of Physics, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Anton V Malko
- Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080, United States
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Wang Y, Wang P, Li H, Han X, Zhu H, Jin X. Nanocrystal-Loaded Lipid Carriers for Improved Oral Absorption and Anticancer Efficacy of Etoposide: Formulation Development, Transport Mechanism, In Vitro and In Vivo Evaluation. Mol Pharm 2024; 21:1170-1181. [PMID: 38329909 DOI: 10.1021/acs.molpharmaceut.3c00785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
To improve the oral absorption and anticancer efficacy of the BCS-IV drug etoposide (ETO), oral nanocrystal-loaded lipid carriers (Lipo@NCs) were developed in this study by modifying the BCS-IV drug nanocrystal with the lipid bilayer. The ETO-Lipo@NCs were prepared by the thin film hydration high-pressure homogenization method, and the core of positively charged ETO nanocrystals was prepared by the sonoprecipitation-high pressure homogenization method. The optimized ETO-Lipo@NCs were spherical particles with an average particle size of 220.3 ± 14.2 nm and a zeta potential of -9.95 ± 0.81 mV, respectively. The successful coating of a lipid bilayer on the surface of nanocrystals in ETO-Lipo@NCs was confirmed by several characterization methods. Compared to nanocrystals, the release rate and degree of Lipo@NCs in SIF were significantly decreased, indicating that the lipid bilayer can effectively prevent the rapid dissolution of core nanocrystals. ETO-Lipo@NCs demonstrated a significant improvement in the intestinal permeability and absorption of ETO in a single intestinal perfusion experiment. In the cells, ETO-Lipo@NCs showed enhanced cellular uptake and transepithelial transport compared with ETO nanocrystals. Pharmacokinetic analysis indicated that ETO-Lipo@NCs had a longer plasma half-life than ETO solution, and the oral bioavailability of ETO-Lipo@NCs was 1.96- and 10.92-fold higher than that of ETO nanocrystals and ETO coarse crystals, respectively. Moreover, the ETO-Lipo@NCs orally dosed at 10 mg/kg exhibited an excellent inhibitory effect against tumors in a subcutaneous Lewis lung carcinoma (LLC) xenograft model compared with other preparations. These results indicate that the Lipo@NCs formulation has an oral absorption-promoting effect of the BCS-IV drug ETO, which could warrant further application in the oral delivery of other poorly bioavailable drugs.
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Affiliation(s)
- Yue Wang
- School of Pharmacy, Jilin University, Changchun 130021, China
- Department of Pharmacy, Beijing Hospital; National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Science; Beijing Key Laboratory of Assessment of Clinical Drugs Risk and Individual Application (Beijing Hospital), Beijing 100730, China
| | - Ping Wang
- School of Pharmacy, Jilin University, Changchun 130021, China
| | - Haiyan Li
- The Affiliated Hospital of Changchun University of Chinese Medicine, Changchun 130021, China
| | - Xiaoran Han
- School of Pharmacy, Jilin University, Changchun 130021, China
| | - Haibin Zhu
- Department of Pharmacy, Yangpu Hospital, School of Medicine, Tongji University, Shanghai 200090, China
| | - Xiangqun Jin
- School of Pharmacy, Jilin University, Changchun 130021, China
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Ding Y, Zhao T, Fang J, Song J, Dong H, Liu J, Li S, Zhao M. Recent developments in the use of nanocrystals to improve bioavailability of APIs. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2024; 16:e1958. [PMID: 38629192 DOI: 10.1002/wnan.1958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 02/12/2024] [Accepted: 03/08/2024] [Indexed: 04/19/2024]
Abstract
Nanocrystals refer to materials with at least one dimension smaller than 100 nm, composing of atoms arranged in single crystals or polycrystals. Nanocrystals have significant research value as they offer unique advantages over conventional pharmaceutical formulations, such as high bioavailability, enhanced targeting selectivity and controlled release ability and are therefore suitable for the delivery of a wide range of drugs such as insoluble drugs, antitumor drugs and genetic drugs with broad application prospects. In recent years, research on nanocrystals has been progressively refined and new products have been launched or entered the clinical phase of studies. However, issues such as safety and stability still stand that need to be addressed for further development of nanocrystal formulations, and significant gaps do exist in research in various fields in this pharmaceutical arena. This paper presents a systematic overview of the advanced development of nanocrystals, ranging from the preparation approaches of nanocrystals with which the bioavailability of poorly water-soluble drugs is improved, critical properties of nanocrystals and associated characterization techniques, the recent development of nanocrystals with different administration routes, the advantages and associated limitations of nanocrystal formulations, the mechanisms of physical instability, and the enhanced dissolution performance, to the future perspectives, with a final view to shed more light on the future development of nanocrystals as a means of optimizing the bioavailability of drug candidates. This article is categorized under: Therapeutic Approaches and Drug Discovery > Emerging Technologies Nanotechnology Approaches to Biology > Nanoscale Systems in Biology.
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Affiliation(s)
- Yidan Ding
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Tongyi Zhao
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Jianing Fang
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Jiexin Song
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Haobo Dong
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Jiarui Liu
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
| | - Sijin Li
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
- School of Pharmacy, Queen's University Belfast, Belfast, UK
| | - Min Zhao
- China Medical University-Queen's University Belfast Joint College (CQC), China Medical University, Shenyang, China
- School of Pharmacy, Queen's University Belfast, Belfast, UK
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Lu H, Ban Z, Xiao K, Sun M, Liu Y, Chen F, Shi T, Chen L, Shao D, Zhang M, Li W. Hepatic-Accumulated Obeticholic Acid and Atorvastatin Self-Assembled Nanocrystals Potentiate Ameliorative Effects in Treatment of Metabolic-Associated Fatty Liver Disease. Adv Sci (Weinh) 2024; 11:e2308866. [PMID: 38196299 PMCID: PMC10933608 DOI: 10.1002/advs.202308866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Indexed: 01/11/2024]
Abstract
Exploration of medicines for efficient and safe management of metabolic-associated fatty liver disease (MAFLD) remains a challenge. Obeticholic acid (OCA), a selective farnesoid X receptor agonist, has been reported to ameliorate injury and inflammation in various liver diseases. However, its clinical application is mainly limited by poor solubility, low bioavailability, and potential side effects. Herein a hepatic-targeted nanodrugs composed of OCA and cholesterol-lowering atorvastatin (AHT) with an ideal active pharmaceutical ingredient (API) content for orally combined treatment of MAFLD is created. Such carrier-free nanocrystals (OCAHTs) are self-assembled, not only improving the stability in gastroenteric environments but also achieving hepatic accumulation through the bile acid transporter-mediated enterohepatic recycling process. Orally administrated OCAHT outperforms the simple combination of OCA and AHT in ameliorating of liver damage and inflammation in both acetaminophen-challenged mice and high-fat diet-induced MAFLD mice with less systematic toxicity. Importantly, OCAHT exerts profoundly reverse effects on MAFLD-associated molecular pathways, including impairing lipid metabolism, reducing inflammation, and enhancing the antioxidation response. This work not only provides a facile bile acid transporter-based strategy for hepatic-targeting drug delivery but also presents an efficient and safe full-API nanocrystal with which to facilitate the practical translation of nanomedicines against MAFLD.
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Affiliation(s)
- Huanfen Lu
- School of Biomedical Sciences and EngineeringSouth China University of TechnologyGuangzhouGuangdong511442China
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Zhenglan Ban
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
- School of MedicineSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Kai Xiao
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
- School of MedicineSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Madi Sun
- School of Biomedical Sciences and EngineeringSouth China University of TechnologyGuangzhouGuangdong511442China
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Yongbo Liu
- College of Chinese Medicinal MaterialsJilin Agricultural UniversityChangchun130118China
| | - Fangman Chen
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Tongfei Shi
- School of Biomedical Sciences and EngineeringSouth China University of TechnologyGuangzhouGuangdong511442China
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Li Chen
- College of MedicineJilin UniversityChangchun130021China
| | - Dan Shao
- School of Biomedical Sciences and EngineeringSouth China University of TechnologyGuangzhouGuangdong511442China
- National Engineering Research Center for Tissue Restoration and ReconstructionSouth China University of TechnologyGuangzhouGuangdong510006China
- School of MedicineSouth China University of TechnologyGuangzhouGuangdong510006China
| | - Ming Zhang
- College of MedicineJilin UniversityChangchun130021China
| | - Wei Li
- College of Chinese Medicinal MaterialsJilin Agricultural UniversityChangchun130118China
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Sethi M, Rana R, Sambhakar S, Chourasia MK. Nanocosmeceuticals: Trends and Recent Advancements in Self Care. AAPS PharmSciTech 2024; 25:51. [PMID: 38424412 DOI: 10.1208/s12249-024-02761-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 02/06/2024] [Indexed: 03/02/2024] Open
Abstract
The term cosmetics refers to any substances or products intended for external application on the skin with the aim of protection and better appearance of the skin surface. The skin delivery system promotes the controlled and targeted delivery of active ingredients. The development of this system has been driven by challenges encountered with conventional cosmeceuticals, including low skin retention of active components, limited percutaneous penetration, poor water dispersion of insoluble active ingredients, and instability of effective components. The aim is to create cosmeceuticals that can effectively overcome these issues. This review focuses on various nanocarriers used in cosmeceuticals currently and their applications in skin care, hair care, oral care, and more. The importance of nanotechnology in the sphere of research and development is growing. It provides solutions to various problems faced by conventional technologies, methods, and product formulations thus taking hold of the cosmetic industry as well. Nowadays, consumers are investing in cosmetics only for better appearance thus problems like wrinkles, ageing, hair loss, and dandruff requires to be answered proficiently. Nanocarriers not only enhance the efficacy of cosmeceutical products, providing better and longer-lasting effects, but they also contribute to the improved aesthetic appearance of the products. This dual benefit not only enhances the final quality and efficacy of the product but also increases consumer satisfaction. Additionally, nanocarriers offer protection against UV rays, further adding to the overall benefits of the cosmeceutical product. Figure 1 represents various advantages of nanocarriers used in cosmeceuticals. Nanotechnology is also gaining importance due to their high penetration of actives in the deeper layers of skin. It can be said that nanotechnology is taking over all the drawbacks of the traditional products. Thus, nanocarriers discussed in this review are used in nanotechnology to deliver the active ingredient of the cosmeceutical product to the desired site.
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Affiliation(s)
- Mitali Sethi
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, India
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan, 304022, India
| | - Rafquat Rana
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Sharda Sambhakar
- Department of Pharmacy, Banasthali Vidyapith, Banasthali, Rajasthan, 304022, India
| | - Manish K Chourasia
- Division of Pharmaceutics and Pharmacokinetics, CSIR-Central Drug Research Institute, Lucknow, 226031, India.
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Li F, Wang H, Chen Z, Liu X, Wang P, Zhang W, Dong H, Fu J, Wang Z, Shao Y. Aging CsPbBr 3 Nanocrystal Wafer for Ultralow Ionic Migration and Environmental Stability for Direct X-ray Detection. ACS Appl Mater Interfaces 2024; 16:10344-10351. [PMID: 38350064 DOI: 10.1021/acsami.3c16870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
The outstanding photoelectric properties of perovskites demonstrate extreme promise for application in X-ray detection. However, the soft lattice of the perovskite results in severe ionic migration for three-dimensional materials, limiting the operation stability of perovskite X-ray detectors. Although ligand-decorated nanocrystals (NCs) exhibit significantly higher stability than three-dimensional perovskites, defects remaining on the interface of NCs could still trigger halide migration under a high bias due to the incomplete ligand decoration. Furthermore, it is still challenging to realize sufficient thickness of absorption layers based on NCs for X-ray detectors through traditional methods. Herein, we develop a centimeter-size and millimeter-thick wafer based on CsPbBr3 NCs through isostatic pressing for X-ray detectors, in which the interfacial defects of NCs are remedied by CsPb2Br5 during aging of wafer in ambient humidity. The wafer shows outstanding sensitivity (200 μC Gyair-1 cm-2) and ultralow dark current drift (1.78 × 10-8 nA cm-1 s-1 V-1 @ 400 V cm-1). Moreover, it shows storage stability with negligible performance degradation for 60 days in ambient humidity. Thus, aging perovskite NC wafers for X-ray detection holds huge potential for next-generation X-ray imaging plates.
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Affiliation(s)
- Fenghua Li
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Hu Wang
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Zhilong Chen
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xin Liu
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Pengxiang Wang
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Wenqing Zhang
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Hao Dong
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- School of Microelectronics, Shanghai University, Shanghai 201899, China
| | - Jie Fu
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- School of Microelectronics, Shanghai University, Shanghai 201899, China
| | - Zhiyuan Wang
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Yuchuan Shao
- Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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Zhang Z, Ghonge S, Ding Y, Zhang S, Berciu M, Schaller RD, Jankó B, Kuno M. Resonant Multiple-Phonon Absorption Causes Efficient Anti-Stokes Photoluminescence in CsPbBr 3 Nanocrystals. ACS Nano 2024; 18:6438-6444. [PMID: 38363716 DOI: 10.1021/acsnano.3c11908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
Lead halide perovskite nanocrystals, such as CsPbBr3, exhibit efficient photoluminescence (PL) up-conversion, also referred to as anti-Stokes photoluminescence (ASPL). This is a phenomenon where irradiating nanocrystals up to 100 meV below gap results in higher energy band edge emission. Most surprising is that ASPL efficiencies approach unity and involve single-photon interactions with multiple phonons. This is unexpected given the statistically disfavored nature of multiple-phonon absorption. Here, we report and rationalize near-unity anti-Stokes photoluminescence efficiencies in CsPbBr3 nanocrystals and attribute them to resonant multiple-phonon absorption by polarons. The theory explains paradoxically large efficiencies for intrinsically disfavored, multiple-phonon-assisted ASPL in nanocrystals. Moreover, the developed microscopic mechanism has immediate and important implications for applications of ASPL toward condensed phase optical refrigeration.
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Affiliation(s)
- Zhuoming Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Sushrut Ghonge
- Department of Physics and Astronomy, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Yang Ding
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Shubin Zhang
- Department of Physics and Astronomy, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Mona Berciu
- Department of Physics and Astronomy, University of British Columbia, Vancouver Campus 325-6224, Agricultural Road, Vancouver, BC V6T 1Z1, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Richard D Schaller
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Boldizsár Jankó
- Department of Physics and Astronomy, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Masaru Kuno
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
- Department of Physics and Astronomy, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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Chaturvedi A, Sharma S, Shukla R. Drug Nanocrystals: A Delivery Channel for Antiviral Therapies. AAPS PharmSciTech 2024; 25:41. [PMID: 38366178 DOI: 10.1208/s12249-024-02754-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/23/2024] [Indexed: 02/18/2024] Open
Abstract
Viral infections represent a significant threat to global health due to their highly communicable and potentially lethal nature. Conventional antiviral interventions encounter challenges such as drug resistance, tolerability issues, specificity concerns, high costs, side effects, and the constant mutation of viral proteins. Consequently, the exploration of alternative approaches is imperative. Therefore, nanotechnology-embedded drugs excelled as a novel approach purporting severe life-threatening viral disease. Integrating nanomaterials and nanoparticles enables ensuring precise drug targeting, improved drug delivery, and fostered pharmacokinetic properties. Notably, nanocrystals (NCs) stand out as one of the most promising nanoformulations, offering remarkable characteristics in terms of physicochemical properties (higher drug loading, improved solubility, and drug retention), pharmacokinetics (enhanced bioavailability, dose reduction), and optical properties (light absorptivity, photoluminescence). These attributes make NCs effective in diagnosing and ameliorating viral infections. This review comprises the prevalence, pathophysiology, and resistance of viral infections along with emphasizing on failure of current antivirals in the management of the diseases. Moreover, the review also highlights the role of NCs in various viral infections in mitigating, diagnosing, and other NC-based strategies combating viral infections. In vitro, in vivo, and clinical studies evident for the effectiveness of NCs against viral pathogens are also discussed.
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Affiliation(s)
- Akanksha Chaturvedi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow, 226002, India
| | - Swapnil Sharma
- Department of Pharmacy, Banasthali University, Banasthali, Rajasthan, 304022, India
| | - Rahul Shukla
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow, 226002, India.
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10
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Shi X, Nazirkar NP, Kashikar R, Karpov D, Folarin S, Barringer Z, Williams S, Kiefer B, Harder R, Cha W, Yuan R, Liu Z, Xue D, Lookman T, Ponomareva I, Fohtung E. Enhanced Piezoelectric Response at Nanoscale Vortex Structures in Ferroelectrics. ACS Appl Mater Interfaces 2024; 16:7522-7530. [PMID: 38290474 PMCID: PMC10876051 DOI: 10.1021/acsami.3c06018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 10/29/2023] [Accepted: 10/31/2023] [Indexed: 02/01/2024]
Abstract
The piezoelectric response is a measure of the sensitivity of a material's polarization to stress or its strain to an applied field. Using in operando X-ray Bragg coherent diffraction imaging, we observe that topological vortices are the source of a 5-fold enhancement of the piezoelectric response near the vortex core. The vortices form where several low-symmetry ferroelectric phases and phase boundaries coalesce. Unlike bulk ferroelectric solid solutions in which a large piezoelectric response is associated with coexisting phases in the proximity of the triple point, the largest responses for pure BaTiO3 at the nanoscale are in spatial regions of extremely small spontaneous polarization at vortex cores. The response decays inversely with polarization away from the vortex, analogous to the behavior in bulk ceramics as the cation compositions are varied away from the triple point. We use first-principles-based molecular dynamics to augment our observations, and our results suggest that nanoscale piezoelectric materials with a large piezoelectric response can be designed within a parameter space governed by vortex cores. Our findings have implications for the development of next-generation nanoscale piezoelectric materials.
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Affiliation(s)
- Xiaowen Shi
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, 110 8th Street, Troy, New
York 12180, United States
| | - Nimish Prashant Nazirkar
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, 110 8th Street, Troy, New
York 12180, United States
| | - Ravi Kashikar
- Department
of Physics, University of South Florida, 4202 East Fowler Avenue, ISA 5103, Tampa, Florida 33620-5700, United States
| | - Dmitry Karpov
- ESRF
- The European Synchrotron, ID16A Beamline, 38043 Grenoble Cedex 9, France
| | - Shola Folarin
- Department
of Physics, University of South Florida, 4202 East Fowler Avenue, ISA 5103, Tampa, Florida 33620-5700, United States
| | - Zachary Barringer
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, 110 8th Street, Troy, New
York 12180, United States
| | - Skye Williams
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, 110 8th Street, Troy, New
York 12180, United States
| | - Boris Kiefer
- Department
of Physics, New Mexico State University, 1255 North Horseshoe, Las Cruces, New Mexico 88003, United States
| | - Ross Harder
- Advanced
Photon Source, Argonne, Illinois 60439, United States
| | - Wonsuk Cha
- Advanced
Photon Source, Argonne, Illinois 60439, United States
| | - Ruihao Yuan
- State Key
Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
| | - Zhen Liu
- Department
of Materials Science, Technical University
of Darmstadt, Darmstadt 64287, Germany
| | - Dezhen Xue
- State Key
Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
| | - Turab Lookman
- AiMaterials
Research LLC, Santa Fe, New Mexico 87501, United States
| | - Inna Ponomareva
- Department
of Physics, University of South Florida, 4202 East Fowler Avenue, ISA 5103, Tampa, Florida 33620-5700, United States
| | - Edwin Fohtung
- Department
of Materials Science and Engineering, Rensselaer
Polytechnic Institute, 110 8th Street, Troy, New
York 12180, United States
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11
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Feng S, Ju Y, Duan R, Man Z, Li S, Hu F, Zhang C, Tao S, Zhang W, Xiao M, Wang X. Complete Suppression of Phase Segregation in Mixed-Halide Perovskite Nanocrystals under Periodic Heating. Adv Mater 2024; 36:e2308032. [PMID: 37994680 DOI: 10.1002/adma.202308032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 11/18/2023] [Indexed: 11/24/2023]
Abstract
Under continuous light illumination, it is known that localized domains with segregated halide compositions form in semiconducting mixed-halide perovskites, thus severely limiting their optoelectronic applications due to the negative changes in bandgap energies and charge-carrier characteristics. Here mixed-halide perovskite CsPbBr1.2 I1.8 nanocrystals are deposited onto an indium tin oxide substrate, whose temperature can be rapidly changed by ≈10 °C in a few seconds by applying or removing an external voltage. Such a sudden temperature change induces a temporary transition of CsPbBr1.2 I1.8 nanocrystals from the segregated phase to the mixed phase, the latter of which can be permanently maintained when the light illumination is coupled with periodic heating cycles. These findings mark the emergence of a practical solution to the detrimental phase-segregation problem, given that a small temperature modulation is readily available in various fundamental studies and practical devices of mixed-halide perovskites.
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Affiliation(s)
- Shengnan Feng
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Yu Ju
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Rentong Duan
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Zaiqin Man
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Shuyi Li
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Fengrui Hu
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Chunfeng Zhang
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - Shuxia Tao
- Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Weihua Zhang
- College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China
| | - Min Xiao
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
- Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA
| | - Xiaoyong Wang
- School of Physics, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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12
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Strandell D, Mora Perez C, Wu Y, Prezhdo OV, Kambhampati P. Excitonic Quantum Coherence in Light Emission from CsPbBr 3 Metal-Halide Perovskite Nanocrystals. Nano Lett 2024; 24:61-66. [PMID: 38113396 DOI: 10.1021/acs.nanolett.3c03180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
The decay of excited states via radiative and nonradiative paths is well understood in molecules and bulk semiconductors but less so in nanocrystals. Here, we perform time-resolved photoluminescence (t-PL) experiments on CsPbBr3 metal-halide perovskite nanocrystals, with a time resolution of 3 ps, sufficient to observe the decay of both excitons and biexcitons as a function of temperature. The striking result is that the radiative rate constant of the single exciton increases at low temperatures with an exponential functional form, suggesting quantum coherent effects with dephasing at high temperatures. The opposing directions of the radiative and nonradiative decay rate constants enable enhanced brightening of PL from excitons to biexcitons due to quantum effects, promoting a faster approach to the quantum theoretical limits of light emission. Ab initio quantum dynamics simulations reproduce the experimental observations of radiation controlled by quantum spatial coherence enhanced at low temperatures.
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Affiliation(s)
- Dallas Strandell
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Carlos Mora Perez
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Yifan Wu
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Oleg V Prezhdo
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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13
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Ueda H, Saitow KI. Cost-Effective Ultrabright Silicon Quantum Dots and Highly Efficient LEDs from Low-Carbon Hydrogen Silsesquioxane Polymers. ACS Appl Mater Interfaces 2024; 16:985-997. [PMID: 38153210 DOI: 10.1021/acsami.3c11120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Cost-effective methods of synthesizing bright colloidal silicon quantum dots (SiQDs) for use as heavy-metal-free QDs, which have applications as light sources in biomedicine and displays, are required. We report simple protocols for synthesizing ultrabright colloidal SiQDs and fabricating SiQD LEDs based on hydrogen silsesquioxane (HSQ) polymer synthesis. Red photoluminescence with a quantum yield (PLQY) of 60-80% and LEDs with an external quantum efficiency (EQE) of >10% were obtained at 1/3600th of the cost of existing methods. This was achieved by using HSiCl3 and a low-polarity solvent to prepare the HSQ polymer and by optimizing the LED hole-injection layer thickness. A stochastic analysis of 31 SiQD syntheses revealed that SiQDs with the highest PLQYs were obtained from a hard, low-carbon HSQ polymer precursor containing many Si-H groups and cage structures. Notably, simple FTIR measurements predicted whether a HSQ polymer would yield high-PLQY SiQDs and high-EQE LEDs. These straightforward, cost-effective protocols should lead to advances in SiQD synthesis and LED fabrication methods.
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Affiliation(s)
- Honoka Ueda
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ken-Ichi Saitow
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- Department of Materials Science, Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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14
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Strandell DP, Zenatti D, Nagpal P, Ghosh A, Dirin DN, Kovalenko MV, Kambhampati P. Hot Excitons Cool in Metal Halide Perovskite Nanocrystals as Fast as CdSe Nanocrystals. ACS Nano 2024; 18:1054-1062. [PMID: 38109401 DOI: 10.1021/acsnano.3c10301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
The idea of phonon bottlenecks has long been pursued in nanoscale materials for their application in hot exciton devices, such as photovoltaics. Decades ago, it was shown that there is no quantum phonon bottleneck in strongly confined quantum dots due to their physics of quantum confinement. More recently, it was proposed that there are hot phonon bottlenecks in metal halide perovskites due to their physics. Recent work has called into question these bottlenecks in metal halide perovskites. Here, we compare hot exciton cooling in a range of sizes of CsPbBr3 nanocrystals from weakly to strongly confined. These results are compared to strongly confined CdSe quantum dots of two sizes and degrees of quantum confinement. CdSe is a model system as a ruler for measuring hot exciton cooling being fast, by virtue of its efficient Auger-assisted processes. By virtue of 3 ps time resolution, the hot exciton photoluminescence can now be directly observed, which is the most direct measure of the presence of hot excitons and their lifetimes. The hot exciton photoluminescence decays on nearly the same 2 ps time scale on both the weakly confined perovskite and the larger CdSe quantum dots, much faster than the 10 ps cooling predicted by transient absorption experiments. The smaller CdSe quantum dot has still faster cooling, as expected from quantum size effects. The quantum dots of perovskites show extremely fast hot exciton cooling, decaying faster than detection limits of <1 ps, even faster than the CdSe system, suggesting the efficiency of Auger processes in these metal halide perovskite nanocrystals and especially in their quantum dot form. These results across a range of sizes of nanocrystals reveal extremely fast hot exciton cooling at high exciton density, independent of composition, but dependent upon size. Hence these metal halide perovskite nanocrystals seem to cool heavily following quantum dot physics.
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Affiliation(s)
| | - Davide Zenatti
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Priya Nagpal
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Arnab Ghosh
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Dmitry N Dirin
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dubendorf, Switzerland
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15
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Oddo AM, Gao M, Weinberg D, Jin J, Folgueras MC, Song C, Ophus C, Mani T, Rabani E, Yang P. Energy Funneling in a Noninteger Two-Dimensional Perovskite. Nano Lett 2023; 23:11469-11476. [PMID: 38060980 DOI: 10.1021/acs.nanolett.3c03058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Energy funneling is a phenomenon that has been exploited in optoelectronic devices based on low-dimensional materials to improve their performance. Here, we introduce a new class of two-dimensional semiconductor, characterized by multiple regions of varying thickness in a single confined nanostructure with homogeneous composition. This "noninteger 2D semiconductor" was prepared via the structural transformation of two-octahedron-layer-thick (n = 2) 2D cesium lead bromide perovskite nanosheets; it consisted of a central n = 2 region surrounded by edge-lying n = 3 regions, as imaged by electron microscopy. Thicker noninteger 2D CsPbBr3 nanostructures were obtained as well. These noninteger 2D perovskites formed a laterally coupled quantum well band alignment with virtually no strain at the interface and no dielectric barrier, across which unprecedented intramaterial funneling of the photoexcitation energy was observed from the thin to the thick regions using time-resolved absorption and photoluminescence spectroscopy.
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Affiliation(s)
- Alexander M Oddo
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mengyu Gao
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Daniel Weinberg
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jianbo Jin
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
| | - Maria C Folgueras
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
| | - Chengyu Song
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Colin Ophus
- National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Tomoyasu Mani
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Eran Rabani
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- The Raymond and Beverly Sackler Center of Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 69978, Israel
| | - Peidong Yang
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
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16
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Strandell D, Dirin D, Zenatti D, Nagpal P, Ghosh A, Raino G, Kovalenko MV, Kambhampati P. Enhancing Multiexcitonic Emission in Metal-Halide Perovskites by Quantum Confinement. ACS Nano 2023; 17:24910-24918. [PMID: 38079478 DOI: 10.1021/acsnano.3c06497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
Semiconductor metal halide perovskite nanocrystals have been under intense investigation for their promise in a variety of optoelectronic applications, which arises from their remarkable properties of defect tolerance and efficient light emission. Recently, quantum dot versions of perovskite nanocrystals have been available, enabling investigation of how quantum size effects control optical function and performance in these quantum dots (QD), past their well-known covalent II-VI analogues. We perform time-resolved photoluminescence (t-PL) experiments on CsPbBr3 perovskite nanocrystals spanning in diameter from 5.8 nm strongly confined quantum dots to 18 nm weakly confined quantum dots. Experiments are performed with sufficient time resolution of 3 ps to observe the interaction energies and recombination kinetics from excitons to multiexcitons. Comparing the same sized QD reveals that perovskite QD have a larger radiative rate constant for emission from X than CdSe QD due to a larger oscillator strength. The multiexciton (MX) regime reveals that perovskite QD emit brightly and with more focused bandwidth than equivalent sized CdSe QD enabling more spectrally pure brightness. The MX kinetics reveals that the perovskite QD maintain efficient radiative decay, effectively competing with Auger recombination. These experiments reveal that the strongly confined QD of perovskites can be efficient multiexcitonic emitters, such as in high brightness light emitting diodes, especially in the blue.
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Affiliation(s)
- Dallas Strandell
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Dmitry Dirin
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Davide Zenatti
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Priya Nagpal
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Arnab Ghosh
- Department of Chemistry, McGill University, Montreal, H3A 0B8, Canada
| | - Gabriele Raino
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
- Empa - Swiss Federal Laboratories for Materials Science and Technology, 8600 Dubendorf, Switzerland
| | - Maksym V Kovalenko
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
- Empa - Swiss Federal Laboratories for Materials Science and Technology, 8600 Dubendorf, Switzerland
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17
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Fathy Elhabal S, El-Nabarawi MA, Abdelaal N, Elrefai MFM, Ghaffar SA, Khalifa MM, Mohie PM, Waggas DS, Hamdan AME, Alshawwa SZ, Saied EM, Elzohairy NA, Elnawawy T, Gad RA, Elfar N, Mohammed H, Khasawneh MA. Development of canagliflozin nanocrystals sublingual tablets in the presence of sodium caprate permeability enhancer: formulation optimization, characterization, in-vitro, in silico, and in-vivo study. Drug Deliv 2023; 30:2241665. [PMID: 37537858 PMCID: PMC10946264 DOI: 10.1080/10717544.2023.2241665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/12/2023] [Indexed: 08/05/2023] Open
Abstract
Canagliflozin (CFZ) is a sodium-glucose cotransporter-2 inhibitor (SGLT2) that lowers albuminuria in type-2 diabetic patients, cardiovascular, kidney, and liver disease. CFZ is classified as class IV in the Biopharmaceutical Classification System (BCS) and is characterized by low permeability, solubility, and bioavailability, most likely attributed to hepatic first-pass metabolism. Nanocrystal-based sublingual formulations were developed in the presence of sodium caprate, as a wetting agent, and as a permeability enhancer. This formulation is suitable for children and adults and could enhance solubility, permeability, and avoid enterohepatic circulation due to absorption through the sublingual mucosa. In the present study, formulations containing various surfactants (P237, P338, PVA, and PVP K30) were prepared by the Sono-homo-assisted precipitation ion technique. The optimized formula prepared with PVP-K30 showed the smallest particle size (157 ± 0.32 nm), Zeta-potential (-18 ± 0.01), and morphology by TEM analysis. The optimized formula was subsequently formulated into a sublingual tablet containing Pharma burst-V® with a shorter disintegration time (51s) for the in-vivo study. The selected sublingual tablet improved histological and biochemical markers (blood glucose, liver, and kidney function), AMP-activated protein kinase (AMPK), and protein kinase B (AKT) pathway compared to the market formula, increased CFZ's antidiabetic potency in diabetic rabbits, boosted bioavailability by five-fold, and produced faster onset of action. These findings suggest successful treatment of diabetes with CFZ nanocrystal-sublingual tablets.
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Affiliation(s)
- Sammar Fathy Elhabal
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Modern University for Technology and Information (MTI), Mokattam, Cairo, Egypt
| | - Mohamed A El-Nabarawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Nashwa Abdelaal
- Department of Integrative Physiology, Baylor College of Medicine, Houston, Texas, USA
| | - Mohamed Fathi Mohamed Elrefai
- Department of Anatomy, Histology, Physiology and Biochemistry, Faculty of Medicine, The Hashemite University, Zarqa, Jordan
- Department of Anatomy and Embryology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Shrouk A. Ghaffar
- Medical Affairs Department, Caduceus Lane Healthcare, Alexandria, Egypt
| | - Mohamed Mansour Khalifa
- Department of Human Physiology, Faculty of Medicine, Cairo University, Cairo, Egypt
- Department of Human Physiology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | - Dania S. Waggas
- Department of Pathological Science, Fakeeh College for Medical Science, Jeddah, Saudi Arabia
| | | | - Samar Zuhair Alshawwa
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Essa M. Saied
- Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt
- Institute for Chemistry, Humboldt Universität zu Berlin, Berlin, Germany
| | - Nahla A. Elzohairy
- Air Force Specialized Hospital, Cairo, Egypt
- Department of Microbiology and Immunology, Faculty of Pharmacy, Modern University for Technology and Information (MTI), Mokattam, Cairo, Egypt
| | - Tayseer Elnawawy
- Department of pharmaceutics, Egyptian Drug Authority, Cairo, Egypt
| | - Rania A. Gad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Nahda University, Beni-Suef (NUB), Beni-Suef, Egypt
| | - Nehal Elfar
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Horus University, New Damietta, Egypt
| | - Hanaa Mohammed
- Human Anatomy and Embryology Department, Faculty of Medicine, Sohag University, Sohag, Egypt
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18
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Liu J, Zhu C, Pols M, Zhang Z, Hu F, Wang L, Zhang C, Liu Z, Tao S, Xiao M, Wang X. Discrete Elemental Distributions inside a Single Mixed-Halide Perovskite Nanocrystal for the Self-Assembly of Multiple Quantum-Light Sources. Nano Lett 2023; 23:10089-10096. [PMID: 37890167 DOI: 10.1021/acs.nanolett.3c03761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
An in-depth understanding of the structure-property relationships in semiconductor mixed-halide perovskites is critical for their potential applications in various light-absorbing and light-emitting optoelectronic devices. Here we show that during the crystal growth of mixed-halide CsPbBr1.2I1.8 nanocrystals (NCs), abundant Ruddlesden-Popper (RP) plane stacking faults are formed to release the lattice strain. These RP planes hinder the exchange of halide species across them, resulting in the presence of multiple nanodomains with discrete mixed-halide compositions inside a single CsPbBr1.2I1.8 NC. Photoluminescence peaks from these pre-segregated nanodomains, whose correlated intensity and wavelength variations signify the interactions of coupled quantum dots within a single CsPbBr1.2I1.8 NC, can be simultaneously resolved at cryogenic temperature. Our findings thus point to a fascinating scenario in which a semiconductor nanostructure can be further divided into multiple quantum-light sources, the interaction and manipulation of which will promote novel photophysics to facilitate their potential applications in quantum information technologies.
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Affiliation(s)
- Jinqiu Liu
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Chao Zhu
- SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, and School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
| | - Mike Pols
- Materials Simulation & Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Zhen Zhang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Fengrui Hu
- College of Engineering and Applied Sciences and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Lin Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211816, China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Zheng Liu
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
| | - Shuxia Tao
- Materials Simulation & Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Min Xiao
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Xiaoyong Wang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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19
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Li S, Hu F, Bi Y, Yang H, Lv B, Zhang C, Zhang J, Xiao M, Wang X. Micrometer-Scale Carrier Transport in the Solid Film of Giant CdSe/CdS Nanocrystals Imaged by Transient Absorption Microscopy. Nano Lett 2023; 23:9887-9893. [PMID: 37870769 DOI: 10.1021/acs.nanolett.3c02788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
For the practical applications in solar cells and photodetectors, semiconductor colloidal nanocrystals (NCs) are assembled into a high-concentration film with carrier transport characteristics, the full understanding and effective control of which are critical for the achievement of high light-to-electricity conversion efficiencies. Here we have applied transient absorption microscopy to the solid film of giant CdSe/CdS NCs and discovered that at high pump fluences the carrier transport could reach a long distance of ∼2 μm within ∼30 ps after laser pulse excitation. This intriguing behavior is attributed to the metal-insulator transition and the associated bandlike transport, which are promoted by the enhanced electronic coupling among neighboring NCs with extended wave functions overlap of the excited-state charge carriers. Besides providing fundamental transport information in the regime of high laser pump fluences, the above findings shed light on the rational design of high-power light detecting schemes based on colloidal NCs.
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Affiliation(s)
- Si Li
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Fengrui Hu
- College of Engineering and Applied Sciences, and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing 210093, China
| | - Yanfeng Bi
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Hongyu Yang
- Advanced Photonic Center, Southeast University, Nanjing 210096, China
| | - Bihu Lv
- Department of Scientific Facilities Development and Management, Zhejiang Lab, Hangzhou 311121, China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Jiayu Zhang
- Advanced Photonic Center, Southeast University, Nanjing 210096, China
| | - Min Xiao
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | - Xiaoyong Wang
- National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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20
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Yan T, Zhang H, Fichthorn KA. Minimum Free-Energy Shapes of Ag Nanocrystals: Vacuum vs Solution. ACS Nano 2023; 17:19288-19304. [PMID: 37781898 DOI: 10.1021/acsnano.3c06395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
We use two variants of replica-exchange molecular dynamics (MD) simulations, parallel tempering MD and partial replica exchange MD, to probe the minimum free-energy shapes of Ag nanocrystals containing 100-200 atoms in a vacuum, ethylene glycol (EG) solvent, and EG solvent with a PVP polymer containing 100 repeat units. Our simulations reveal a shape intermediate between a Dh and an Ih, a Dh-Ih, that has distinct structural signatures and magic sizes. We find several prominent features associated with entropy: pure FCC nanocrystals are less common than FCC crystals containing stacking faults, and crystals with the minimum potential energy are not always preferred over the range of relevant temperatures. The shapes of the nanocrystals in solution are influenced by the chemical identities of the solution-phase molecules. Comparing Ag nanocrystal shapes in EG to those in an EG+PVP solution, we find more icosahedra in EG and more decahedra in EG+PVP across all of the nanocrystal sizes probed in this study. At certain critical sizes, nanocrystal shapes can change dramatically with the addition and removal of a single atom or with a change in temperature at a fixed size. The information in our study could be useful in efforts to devise processing routes to achieve selective nanocrystal shapes.
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Affiliation(s)
- Tianyu Yan
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Huaizhong Zhang
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Kristen A Fichthorn
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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21
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Masuda S, Deguchi S, Ogata F, Yoshitomi J, Otake H, Kanai K, Kawasaki N, Nagai N. Nasal Absorption Enhancement of Mometasone Furoate Nanocrystal Dispersions. Int J Nanomedicine 2023; 18:5685-5699. [PMID: 37841023 PMCID: PMC10573391 DOI: 10.2147/ijn.s430952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023] Open
Abstract
Purpose We designed a 0.05% mometasone furoate (MF) nanocrystal dispersion and investigated whether the application of MF nanocrystals in nasal formulations enhanced local absorption compared to traditional nasal MF formulations (CA-MF). Methods MF nanocrystal dispersions (MF-NPs) were prepared by bead milling MF microcrystal dispersions (MF-MPs) consisting of MF, 2-hydroxypropyl-β-cyclodextrin, methylcellulose, and purified water. Pluronic F-127 combined with methylcellulose, Pluronic F-68, or carbopol was used as a base for in situ gelation (thickener). MF concentrations were measured using high-performance liquid chromatography, and nasal absorption of MF was evaluated in 6 week-old male Institute of Cancer Research (ICR) mice. Results The particle size range of MF prepared with the bead mill treatment was 80-200 nm, and the nanoparticles increased the local absorption of MF, which was higher than that of CA-MF and MF-MPs. In addition, unlike the results obtained in the small intestine and corneal tissue, the high absorption of nanocrystalline MF in the nasal mucosa was related to a pathway that was not derived from energy-dependent endocytosis. Moreover, the application of the in situ gelling system attenuated the local absorption of MF-NPs, owing to a decrease in drug diffusion in the dispersions. Conclusion We found that nanoparticulation of MF enhances local intranasal absorption, and nasal bioavailability is higher than that of CA-MF. In addition, we demonstrate that viscosity regulation is an important factor in the design of nasal formulations based on MF nanocrystals. These findings provide insights for the design of novel nanomedicines with enhanced nasal bioavailability.
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Affiliation(s)
- Shuya Masuda
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Saori Deguchi
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | | | | | - Hiroko Otake
- Faculty of Pharmacy, Kindai University, Osaka, Japan
| | - Kazutaka Kanai
- Department of Small Animal Internal Medicine, School of Veterinary Medicine, University of Kitasato, Aomori, Japan
| | | | - Noriaki Nagai
- Faculty of Pharmacy, Kindai University, Osaka, Japan
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22
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Zembala J, Forma A, Zembala R, Januszewski J, Zembala P, Adamowicz D, Teresiński G, Buszewicz G, Flieger J, Baj J. Technological Advances in a Therapy of Primary Open-Angle Glaucoma: Insights into Current Nanotechnologies. J Clin Med 2023; 12:5798. [PMID: 37762739 PMCID: PMC10531576 DOI: 10.3390/jcm12185798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/29/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Glaucoma is a leading cause of irreversible blindness and is characterized by increased intraocular pressure (IOP) and progressive optic nerve damage. The current therapeutic approaches for glaucoma management, such as eye drops and oral medications, face challenges including poor bioavailability, low patient compliance, and limited efficacy. In recent years, nanotechnology has emerged as a promising approach to overcome these limitations and revolutionize glaucoma treatment. In this narrative review, we present an overview of the novel nanotechnologies employed in the treatment of primary open-angle glaucoma. Various nanosystems, including liposomes, niosomes, nanoparticles, and other nanostructured carriers, have been developed to enhance the delivery and bioavailability of antiglaucoma drugs. They offer advantages such as a high drug loading capacity, sustained release, improved corneal permeability, and targeted drug delivery to the ocular tissues. The application of nanotechnologies in glaucoma treatment represents a transformative approach that addresses the limitations of conventional therapies. However, further research is needed to optimize the formulations, evaluate long-term safety, and implement these nanotechnologies into clinical practice. With continued advancements in nanotechnology, the future holds great potential for improving the management and outcomes of glaucoma, ultimately preserving vision and improving the lives of millions affected by this debilitating disease.
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Affiliation(s)
- Julita Zembala
- University Clinical Center, Medical University of Warsaw, Lindleya 4, 02-005 Warsaw, Poland
| | - Alicja Forma
- Department of Forensic Medicine, Medical University of Lublin, Jaczewskiego 8b, 20-090 Lublin, Poland; (G.T.); (G.B.)
| | - Roksana Zembala
- Faculty of Medicine, Cardinal Stefan Wyszynski University in Warsaw, Wóycickiego 1/3, 01-938 Warsaw, Poland;
| | - Jacek Januszewski
- Department of Human Anatomy, Medical University of Lublin, Jaczewskiego 4, 20-090 Lublin, Poland; (J.J.); (J.B.)
| | - Patryk Zembala
- Faculty of Medicine, Medical University of Warsaw, Banacha 1A, 02-097 Warsaw, Poland;
| | - Dominik Adamowicz
- University Clinical Center, Medical University of Warsaw, Banacha 1A, 02-097 Warsaw, Poland;
| | - Grzegorz Teresiński
- Department of Forensic Medicine, Medical University of Lublin, Jaczewskiego 8b, 20-090 Lublin, Poland; (G.T.); (G.B.)
| | - Grzegorz Buszewicz
- Department of Forensic Medicine, Medical University of Lublin, Jaczewskiego 8b, 20-090 Lublin, Poland; (G.T.); (G.B.)
| | - Jolanta Flieger
- Department of Analytical Chemistry, Medical University of Lublin, Chodźki 4A, 20-093 Lublin, Poland;
| | - Jacek Baj
- Department of Human Anatomy, Medical University of Lublin, Jaczewskiego 4, 20-090 Lublin, Poland; (J.J.); (J.B.)
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23
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Lv T, Liu M, Zhou S, Xia Y. Shape Transformation via Etching and Regrowth: A Systematic Study of Pd Nanocrystals with Different Shapes and Twin Structures. Chemistry 2023; 29:e202301465. [PMID: 37319122 DOI: 10.1002/chem.202301465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/17/2023]
Abstract
This article describes a systematic study of the oxidative etching and regrowth behaviors of Pd nanocrystals, including single-crystal cubes bounded by {100} facets, single-crystal octahedra and tetrahedra enclosed by {111} facets; and multiple-twinned icosahedra covered by {111} facets and twin boundaries. During etching, Pd atoms are preferentially oxidized and removed from the corners regardless of the type of nanocrystal, and the resultant Pd2+ ions are then reduced back to elemental Pd. For cubes and icosahedra, the newly formed Pd atoms are deposited on the {100} facets and twin boundaries, respectively, due to their relatively higher energies. For octahedra and tetrahedra, the Pd atoms self-nucleate in the solution phase, followed by their growth into small particles. We can control the regrowth rate relative to etching rate by varying the concentration of HCl in the reaction solution. As the concentration of HCl is increased, 18-nm Pd cubes are transformed into octahedra of 23, 18, and 13 nm, respectively, in edge length. Due to the absence of regrowth, however, Pd octahedra are transformed into truncated octahedra, cuboctahedra, and spheres with decreasing sizes whereas Pd tetrahedra evolve into truncated tetrahedra and spheres. In contrast, Pd icosahedra with twin boundaries on the surface are converted to asymmetric icosahedra, flower-like icosahedra, and spheres. This work not only advances the understanding of etching and growth behaviors of metal nanocrystals with various shapes and twin structures but also offers an alternative method for controlling their shape and size.
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Affiliation(s)
- Tian Lv
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA
| | - Maochang Liu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA
| | - Siyu Zhou
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, USA
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
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24
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Zhao W, Zhang J, Kong F, Ye T. Application of Perovskite Nanocrystals as Fluorescent Probes in the Detection of Agriculture- and Food-Related Hazardous Substances. Polymers (Basel) 2023; 15:2873. [PMID: 37447518 DOI: 10.3390/polym15132873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/15/2023] Open
Abstract
Halide perovskite nanocrystals (PNCs) are a new kind of luminescent material for fluorescent probes. Compared with traditional nanosized luminescent materials, PNCs have better optical properties, such as high fluorescence quantum yield, tunable band gap, low size dependence, narrow emission bandwidth, and so on. Therefore, they have broad application prospects as fluorescent probes in the detection of agriculture- and food-related hazardous substances. In this paper, the structure and basic properties of PNCs are briefly described. The water stabilization methods, such as polymer surface coating, ion doping, surface passivation, etc.; are summarized. The recent advances of PNCs such as fluorescent probes for detecting hazardous substances in the field of agricultural and food are reviewed, and the detection effect and mechanism are discussed and analyzed. Finally, the problems and solutions faced by PNCs as fluorescent probes in agriculture and food were summarized and prospected. It is expected to provide a reference for further application of PNCs as fluorescent probes in agriculture and food.
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Affiliation(s)
- Wei Zhao
- Maize Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Jianguo Zhang
- Maize Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Fanjun Kong
- Harbin Technician College, Harbin 150500, China
| | - Tengling Ye
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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25
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Liu Y, Li M, Wan S, Lim KH, Zhang Y, Li M, Li J, Ibáñez M, Hong M, Cabot A. Surface Chemistry and Band Engineering in AgSbSe 2: Toward High Thermoelectric Performance. ACS Nano 2023. [PMID: 37310395 DOI: 10.1021/acsnano.3c03541] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
AgSbSe2 is a promising thermoelectric (TE) p-type material for applications in the middle-temperature range. AgSbSe2 is characterized by relatively low thermal conductivities and high Seebeck coefficients, but its main limitation is moderate electrical conductivity. Herein, we detail an efficient and scalable hot-injection synthesis route to produce AgSbSe2 nanocrystals (NCs). To increase the carrier concentration and improve the electrical conductivity, these NCs are doped with Sn2+ on Sb3+ sites. Upon processing, the Sn2+ chemical state is conserved using a reducing NaBH4 solution to displace the organic ligand and anneal the material under a forming gas flow. The TE properties of the dense materials obtained from the consolidation of the NCs using a hot pressing are then characterized. The presence of Sn2+ ions replacing Sb3+ significantly increases the charge carrier concentration and, consequently, the electrical conductivity. Opportunely, the measured Seebeck coefficient varied within a small range upon Sn doping. The excellent performance obtained when Sn2+ ions are prevented from oxidation is rationalized by modeling the system. Calculated band structures disclosed that Sn doping induces convergence of the AgSbSe2 valence bands, accounting for an enhanced electronic effective mass. The dramatically enhanced carrier transport leads to a maximized power factor for AgSb0.98Sn0.02Se2 of 0.63 mW m-1 K-2 at 640 K. Thermally, phonon scattering is significantly enhanced in the NC-based materials, yielding an ultralow thermal conductivity of 0.3 W mK-1 at 666 K. Overall, a record-high figure of merit (zT) is obtained at 666 K for AgSb0.98Sn0.02Se2 at zT = 1.37, well above the values obtained for undoped AgSbSe2, at zT = 0.58 and state-of-art Pb- and Te-free materials, which makes AgSb0.98Sn0.02Se2 an excellent p-type candidate for medium-temperature TE applications.
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Affiliation(s)
- Yu Liu
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 230009, Hefei, P. R. China
| | - Mingquan Li
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 230009, Hefei, P. R. China
| | - Shanhong Wan
- Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, 230009, Hefei, P. R. China
| | - Khak Ho Lim
- Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, Zhejiang, P. R. China
- College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Rd, Hangzhou 310007, Zhejiang, P. R. China
| | - Yu Zhang
- Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Mengyao Li
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450052, P. R. China
| | - Junshan Li
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, P. R. China
| | - Maria Ibáñez
- IST Austria, Am Campus 1, 3400 Klosterneuburg, Austria
| | - Min Hong
- Centre for Future Materials and School of Engineering, University of Southern Queensland, Springfield Central, Queensland 4300, Australia
| | - Andreu Cabot
- Catalonia Institute for Energy Research-IREC, Sant Adrià de Besòs, 08930 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats - ICREA, 08010 Barcelona, Spain
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26
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Guan YM, Ye SH, Zhou X, Zang ZZ, Chen LH, Zhu WF. [Preparation and in vitro property evaluation of β-cyclodextrin-daidzein/PEG_(20000)/Carbomer_(940) nanocrystals]. Zhongguo Zhong Yao Za Zhi 2023; 48:2949-2957. [PMID: 37381955 DOI: 10.19540/j.cnki.cjcmm.20230329.302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
This study aims to improve the solubility and bioavailability of daidzein by preparing the β-cyclodextrin-daidzein/PEG_(20000)/Carbomer_(940) nanocrystals. Specifically, the nanocrystals were prepared with daidzein as a model drug, PEG_(20000), Carbomer_(940), and NaOH as a plasticizer, a gelling agent, and a crosslinking agent, respectively. A two-step method was employed to prepare the β-cyclodextrin-daidzein/PEG_(20000)/Carbomer_(940) nanocystals. First, the insoluble drug daidzein was embedded in β-cyclodextrin to form inclusion complexes, which were then encapsulated in the PEG_(20000)/Carbomer_(940) nanocrystals. The optimal mass fraction of NaOH was determined as 0.8% by the drug release rate, redispersability, SEM morphology, encapsulation rate, and drug loading. The inclusion status of daidzein nanocrystals was determined by Fourier transform infrared spectroscopy(FTIR), thermogravimetric analysis(TGA), and X-ray diffraction(XRD) analysis to verify the feasibility of the preparation. The prepared nanocrystals showed the average Zeta potential of(-30.77±0.15)mV and(-37.47±0.64)mV and the particle sizes of(333.60±3.81)nm and(544.60±7.66)nm before and after daidzein loading, respectively. The irregular distribution of nanocrystals before and after daidzein loading was observed under SEM. The redispersability experiment showed high dispersion efficiency of the nanocrystals. The in vitro dissolution rate of nanocrystals in intestinal fluid was significantly faster than that of daidzein, and followed the first-order drug release kinetic model. XRD, FTIR, and TGA were employed to determine the polycrystalline properties, drug loading, and thermal stability of the nanocrystals before and after drug loading. The nanocrystals loaded with daidzein demonstrated obvious antibacterial effect. The nanocrystals had more significant inhibitory effects on Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa than daidzein because of the improved solubility of daidzein. The prepared nanocrystals can significantly increase the dissolution rate and oral bioavailability of the insoluble drug daidzein.
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Affiliation(s)
- Yong-Mei Guan
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
| | - Sheng-Hang Ye
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
| | - Xiang Zhou
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
| | - Zhen-Zhong Zang
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
| | - Li-Hua Chen
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
| | - Wei-Feng Zhu
- Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Ministry of Education, Jiangxi University of Chinese Medicine Nanchang 330004, China
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27
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Wang Z, Srinivasan S, Dai R, Rana A, Nian Q, Solanki K, Wang RY. Inorganically Connecting Colloidal Nanocrystals Significantly Improves Mechanical Properties. Nano Lett 2023. [PMID: 37257060 DOI: 10.1021/acs.nanolett.3c00674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Understanding and characterizing the mechanical behavior of colloidal nanocrystal (NC) assemblies are important for developing nanocrystalline materials with exceptional mechanical properties for robust electronic, thermoelectric, photovoltaic, and optoelectronic devices. However, the limited ranges of Young's modulus, hardness, and fracture toughness (≲1-10 GPa, ≲50-500 MPa, and ≲10-50 kPa m1/2, respectively) in as-synthesized NC assemblies present challenges for their mechanical stability and therefore their practical applications. In this work, we demonstrate using a combination of nanoindentation measurements and coarse-grained modeling that the mechanical response of assemblies of as-synthesized NCs is governed by the van der Waals interactions of the organic surface ligands. More importantly, we report tremendous ∼60× enhancements in Young's modulus and hardness and an ∼80× enhancement in fracture toughness of CdSe NC assemblies through a simple inorganic Sn2S64- ligand exchange process. Moreover, our observation of softening in nanocrystalline materials with decreasing CdSe NC diameter is consistent with atomistic simulations.
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Affiliation(s)
- Zhongyong Wang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Soundarya Srinivasan
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Rui Dai
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Ashish Rana
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Qiong Nian
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Kiran Solanki
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
| | - Robert Y Wang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, Arizona 85281, United States
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28
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Marino E, Rosen DJ, Yang S, Tsai EHR, Murray CB. Temperature-Controlled Reversible Formation and Phase Transformation of 3D Nanocrystal Superlattices Through In Situ Small-Angle X-ray Scattering. Nano Lett 2023; 23:4250-4257. [PMID: 37184728 DOI: 10.1021/acs.nanolett.3c00299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
For decades, the spontaneous organization of nanocrystals into superlattices has captivated the scientific community. However, achieving direct control over the formation of the superlattice and its phase transformations has proven to be a grand challenge, often resulting in the generation of multiple symmetries under the same experimental conditions. Here, we achieve direct control over the formation of the superlattice and its phase transformations by modulating the thermal energy of a nanocrystal dispersion without relying on solvent evaporation. We follow the temperature-dependent dynamics of the self-assembly process using synchrotron-based small-angle X-ray scattering. When cooled below -24.5 °C, lead sulfide nanocrystals form micrometer-sized three-dimensional phase-pure body-centered cubic superlattices. When cooled below -35.1 °C, these superlattices undergo a collective diffusionless phase transformation that yields denser body-centered tetragonal phases. These structural changes can be reversed by increasing the temperature of the dispersion and may lead to the direct modulation of the optical properties of these artificial solids.
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Affiliation(s)
- Emanuele Marino
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennslvania 19104 United States
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, Italy
| | - Daniel J Rosen
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania 19104 United States
| | - Shengsong Yang
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennslvania 19104 United States
| | - Esther H R Tsai
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Building 735, Upton, New York 11973-5000, United States
| | - Christopher B Murray
- Department of Chemistry, University of Pennsylvania, 231 S. 34th Street, Philadelphia, Pennslvania 19104 United States
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania 19104 United States
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29
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Noh J, Jekal S, Yoon CM. Polyaniline-Coated Mesoporous Carbon Nanosheets with Fast Capacitive Energy Storage in Symmetric Supercapacitors. Adv Sci (Weinh) 2023:e2301923. [PMID: 37162216 PMCID: PMC10375140 DOI: 10.1002/advs.202301923] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/21/2023] [Indexed: 05/11/2023]
Abstract
Polyaniline-capped mesoporous carbon nanosheets with high conductivity and porosity are synthesized by vapor deposition polymerization. The mesoporous carbon template is prepared by removing ordered cubic iron oxide nanocrystals embedded in the carbon matrix obtained by thermal decomposition of an iron-oleate complex in a sodium chloride matrix. The evaporated aniline monomers are slowly polymerized on the carbon surface pretreated with FeCl3 as an initiator, partially filling the carbon pores to improve conductivity. The resulting products exhibit efficient hybrid energy storage mechanisms of electric double-layer capacitance and pseudocapacitance. When the nanosheets are assembled for a symmetric supercapacitor, the device capacitance reaches 107.8 F g-1 , at a current density of 0.5 A g-1 , and a capacitance retention of 69.6% is achieved at a ten times higher current density of 5 A g-1 . Electrochemical impedance spectroscopy reveals that the transition from resistive to capacitive behavior occurs within 0.63 s, indicating that fast ion and charge transport results in high capacitance and rate capability. The corresponding energy and power densities are 9.59 Wh kg-1 and 200.1 W kg-1 at a current density of 0.5 A g-1 , demonstrating efficient energy storage in a symmetric supercapacitor.
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Affiliation(s)
- Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon, 34158, South Korea
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejon, 34158, South Korea
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Abbate MTA, Ramöller IK, Sabri AH, Paredes AJ, Hutton AJ, McKenna PE, Peng K, Hollett JA, McCarthy HO, Donnelly RF. Formulation of antiretroviral nanocrystals and development into a microneedle delivery system for potential treatment of HIV-associated neurocognitive disorder (HAND). Int J Pharm 2023; 640:123005. [PMID: 37142137 DOI: 10.1016/j.ijpharm.2023.123005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 05/06/2023]
Abstract
HIV/AIDS remains a major global public health issue. While antiretroviral therapy is effective at reducing the viral load in the blood, up to 50% of those with HIV suffer from some degree of HIV-associated neurocognitive disorder, due to the presence of the blood-brain barrier restricting drugs from crossing into the central nervous system and treating the viral reservoir there. One way to circumvent this is the nose-to-brain pathway. This pathway can also be accessed via a facial intradermal injection. Certain parameters can increase delivery via this route, including using nanoparticles with a positive zeta potential and an effective diameter of 200 nm or less. Microneedle arrays offer a minimally invasive, pain-free alternative to traditional hypodermic injections. This study shows the formulation of nanocrystals of both rilpivirine (RPV) and cabotegravir, followed by incorporation into separate microneedle delivery systems for application to either side of the face. Following an in vivo study in rats, delivery to the brain was seen for both drugs. For RPV, a Cmax was seen at 21 days of 619.17 ± 73.32 ng/g, above that of recognised plasma IC90 levels, and potentially therapeutically relevant levels were maintained for 28 days. For CAB, a Cmax was seen at 28 days of 478.31 ± 320.86 ng/g, and while below recognised 4IC90 levels, does indicate that therapeutically relevant levels could be achieved by manipulating final microaaray patch size in humans.
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Affiliation(s)
- Marco T A Abbate
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Inken K Ramöller
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Akmal H Sabri
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | | | - Aaron J Hutton
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Peter E McKenna
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Ke Peng
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Jessica A Hollett
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Helen O McCarthy
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
| | - Ryan F Donnelly
- School of Pharmacy, Queen's University Belfast, 97 Lisburn Road, BT9 7BL
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31
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Richards L, Flores MD, Millán C, Glynn C, Zee CT, Sawaya MR, Gallagher-Jones M, Borges RJ, Usón I, Rodriguez JA. Fragment-Based Ab Initio Phasing of Peptidic Nanocrystals by MicroED. ACS Bio Med Chem Au 2023; 3:201-210. [PMID: 37096030 PMCID: PMC10119933 DOI: 10.1021/acsbiomedchemau.2c00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/25/2023] [Accepted: 01/30/2023] [Indexed: 04/26/2023]
Abstract
Electron diffraction (MicroED/3DED) can render the three-dimensional atomic structures of molecules from previously unamenable samples. The approach has been particularly transformative for peptidic structures, where MicroED has revealed novel structures of naturally occurring peptides, synthetic protein fragments, and peptide-based natural products. Despite its transformative potential, MicroED is beholden to the crystallographic phase problem, which challenges its de novo determination of structures. ARCIMBOLDO, an automated, fragment-based approach to structure determination, eliminates the need for atomic resolution, instead enforcing stereochemical constraints through libraries of small model fragments, and discerning congruent motifs in solution space to ensure validation. This approach expands the reach of MicroED to presently inaccessible peptide structures including fragments of human amyloids, and yeast and mammalian prions. For electron diffraction, fragment-based phasing portends a more general phasing solution with limited model bias for a wider set of chemical structures.
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Affiliation(s)
- Logan
S. Richards
- Department
of Chemistry and Biochemistry; UCLA-DOE Institute for Genomics and
Proteomics; STROBE, NSF Science and Technology Center, University of California, Los Angeles (UCLA), Los Angeles, California 90095, United States
| | - Maria D. Flores
- Department
of Chemistry and Biochemistry; UCLA-DOE Institute for Genomics and
Proteomics; STROBE, NSF Science and Technology Center, University of California, Los Angeles (UCLA), Los Angeles, California 90095, United States
| | - Claudia Millán
- Crystallographic
Methods, Institute of Molecular Biology
of Barcelona (IBMB−CSIC), Barcelona Science Park, Helix Building, Baldiri
Reixach 15, 08028 Barcelona, Spain
| | - Calina Glynn
- Department
of Chemistry and Biochemistry; UCLA-DOE Institute for Genomics and
Proteomics; STROBE, NSF Science and Technology Center, University of California, Los Angeles (UCLA), Los Angeles, California 90095, United States
| | - Chih-Te Zee
- Department
of Chemistry and Biochemistry; UCLA-DOE Institute for Genomics and
Proteomics; STROBE, NSF Science and Technology Center, University of California, Los Angeles (UCLA), Los Angeles, California 90095, United States
| | - Michael R. Sawaya
- Department
of Biological Chemistry and Department of Chemistry and Biochemistry, University of California Los Angeles (UCLA), Howard
Hughes Medical Institute (HHMI), UCLA-DOE Institute for Genomics and
Proteomics, Los Angeles, California 90095, United States
| | - Marcus Gallagher-Jones
- Correlated
Imaging, The Rosalind Franklin Institute, Harwell Science & Innovation
Campus, Rutherford Avenue, Harwell, Didcot OX11 0GD, United Kingdom
| | - Rafael J. Borges
- Crystallographic
Methods, Institute of Molecular Biology
of Barcelona (IBMB−CSIC), Barcelona Science Park, Helix Building, Baldiri
Reixach 15, 08028 Barcelona, Spain
| | - Isabel Usón
- Crystallographic
Methods, Institute of Molecular Biology
of Barcelona (IBMB−CSIC), Barcelona Science Park, Helix Building, Baldiri
Reixach 15, 08028 Barcelona, Spain
- ICREA,
Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys 23, 08003 Barcelona, Spain
| | - Jose A. Rodriguez
- Department
of Chemistry and Biochemistry; UCLA-DOE Institute for Genomics and
Proteomics; STROBE, NSF Science and Technology Center, University of California, Los Angeles (UCLA), Los Angeles, California 90095, United States
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Lemos Ayres da Gama Bastos F, Wliandon Lemos Barbosa T, Lallo da Silva B, Junior JAO, Aparecida Chiavacci L. Dexamethasone acetate nanocrystals: characterization and dissolution studies in presence of polymorphic phases. Pharm Nanotechnol 2023:PNT-EPUB-130415. [PMID: 37018531 DOI: 10.2174/2211738511666230328134440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 01/16/2023] [Accepted: 01/23/2023] [Indexed: 04/07/2023]
Abstract
BACKGROUND A drug with poor water-solubility, like Dexamethasone acetate, can present lower bioavailability conventional for pharmaceutical formulations, and the presence of polymorphs in the raw material can lead to drug quality problems. OBJECTIVE In this study, nanocrystals of dexamethasone acetate were synthesized by high pressure homogenizer (HPH) method in surfactant poloxamer 188 (P188) solid dispersion and the bioavailable in raw material with polymorphism presence was evaluated. METHODS The powder pre-suspension was prepared by the HPH process, and the nanoparticles formed were incorporated in P188 solutions. The nanocrystals formed were characterized by techniques of XRD, SEM, FTIR, thermal analysis by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), dynamic light scattering (DLS) to analyze the particle size and zeta potential, and in vitro evaluation by dissolution studies. RESULTS The characterization techniques were adequate to show the presence of raw material with physical moisture between two dexamethasone acetate polymorphs. The nanocrystals formed in the presence of the P188 in the formulation showed a considerable increase in the rate of dissolution of the drug in the medium and in the size of the stable nanocrystals, even in the presence of dexamethasone acetate polymorphs. CONCLUSION The results showed that it was possible to produce dexamethasone nanocrystals by HPH process with regular size by the presence of the small amount of P188 surfactant. This article presents a novelty in the development of dexamethasone nanoparticles that have different polymorphic forms in their physical composition.
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Affiliation(s)
| | | | - Bruna Lallo da Silva
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
| | | | - Leila Aparecida Chiavacci
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
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Qaid SMH, Ghaithan HM, Bawazir HS, Bin Ajaj AF, AlHarbi KK, Aldwayyan AS. Successful Growth of TiO 2 Nanocrystals with {001} Facets for Solar Cells. Nanomaterials (Basel) 2023; 13:928. [PMID: 36903806 PMCID: PMC10005624 DOI: 10.3390/nano13050928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 02/28/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
The growth of nanocrystals (NCs) from metal oxide-based substrates with exposed high-energy facets is of particular importance for many important applications, such as solar cells as photoanodes due to the high reactivity of these facets. The hydrothermal method remains a current trend for the synthesis of metal oxide nanostructures in general and titanium dioxide (TiO2) in particular since the calcination of the resulting powder after the completion of the hydrothermal method no longer requires a high temperature. This work aims to use a rapid hydrothermal method to synthesize numerous TiO2-NCs, namely, TiO2 nanosheets (TiO2-NSs), TiO2 nanorods (TiO2-NRs), and nanoparticles (TiO2-NPs). In these ideas, a simple non-aqueous one-pot solvothermal method was employed to prepare TiO2-NSs using tetrabutyl titanate Ti(OBu)4 as a precursor and hydrofluoric acid (HF) as a morphology control agent. Ti(OBu)4 alone was subjected to alcoholysis in ethanol, yielding only pure nanoparticles (TiO2-NPs). Subsequently, in this work, the hazardous chemical HF was replaced by sodium fluoride (NaF) as a means of controlling morphology to produce TiO2-NRs. The latter method was required for the growth of high purity brookite TiO2 NRs structure, the most difficult TiO2 polymorph to synthesize. The fabricated components are then morphologically evaluated using equipment, such as transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), electron diffraction (SAED), and X-ray diffraction (XRD). In the results, the TEM image of the developed NCs shows the presence of TiO2-NSs with an average side length of about 20-30 nm and a thickness of 5-7 nm. In addition, the image TEM shows TiO2-NRs with diameters between 10 and 20 nm and lengths between 80 and 100 nm, together with crystals of smaller size. The phase of the crystals is good, confirmed by XRD. The anatase structure, typical of TiO2-NS and TiO2-NPs, and the high-purity brookite-TiO2-NRs structure, were evident in the produced nanocrystals, according to XRD. SAED patterns confirm that the synthesis of high quality single crystalline TiO2-NSs and TiO2-NRs with the exposed {001} facets are the exposed facets, which have the upper and lower dominant facets, high reactivity, high surface energy, and high surface area. TiO2-NSs and TiO2-NRs could be grown, corresponding to about 80% and 85% of the {001} outer surface area in the nanocrystal, respectively.
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Affiliation(s)
- Saif M. H. Qaid
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- K. A. CARE Energy Research and Innovation Center, King Saud University, Riyadh 11451, Saudi Arabia
| | - Hamid M. Ghaithan
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Huda S. Bawazir
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- K. A. CARE Energy Research and Innovation Center, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abrar F. Bin Ajaj
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- K. A. CARE Energy Research and Innovation Center, King Saud University, Riyadh 11451, Saudi Arabia
| | - Khulod K. AlHarbi
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- K. A. CARE Energy Research and Innovation Center, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdullah S. Aldwayyan
- Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- K. A. CARE Energy Research and Innovation Center, King Saud University, Riyadh 11451, Saudi Arabia
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia
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Baker H, Perez CM, Sonnichsen C, Strandell D, Prezhdo OV, Kambhampati P. Breaking Phonon Bottlenecks through Efficient Auger Processes in Perovskite Nanocrystals. ACS Nano 2023; 17:3913-3920. [PMID: 36796027 DOI: 10.1021/acsnano.2c12220] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The hot phonon bottleneck has been under intense investigation in perovskites. In the case of perovskite nanocrystals, there may be hot phonon bottlenecks as well as quantum phonon bottlenecks. While they are widely assumed to exist, evidence is growing for the breaking of potential phonon bottlenecks of both forms. Here, we perform state-resolved pump/probe spectroscopy (SRPP) and time-resolved photoluminescence spectroscopy (t-PL) to unravel hot exciton relaxation dynamics in model systems of bulk-like 15 nm nanocrystals of CsPbBr3 and FAPbBr3, with FA being formamidinium. The SRPP data can be misinterpreted to reveal a phonon bottleneck even at low exciton concentrations, where there should be none. We circumvent that spectroscopic problem with a state-resolved method that reveals an order of magnitude faster cooling and breaking of the quantum phonon bottleneck that might be expected in nanocrystals. Since the prior pump/probe methods of analysis are shown to be ambiguous, we perform t-PL experiments to unambiguously confirm the existence of hot phonon bottlenecks as well. The t-PL experiments reveal there is no hot phonon bottleneck in these perovskite nanocrystals. Ab initio molecular dynamics simulations reproduce experiments by inclusion of efficient Auger processes. This experimental and theoretical work reveals insight on hot exciton dynamics, how they are precisely measured, and ultimately how they may be exploited in these materials.
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Affiliation(s)
- Harry Baker
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Carlos Mora Perez
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Colin Sonnichsen
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Dallas Strandell
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0B8, Canada
| | - Oleg V Prezhdo
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
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35
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Velásquez-Castillo LE, Leite MA, Tisnado VJA, Ditchfield C, Sobral PJDA, Moraes ICF. Cassava Starch Films Containing Quinoa Starch Nanocrystals: Physical and Surface Properties. Foods 2023; 12. [PMID: 36766104 DOI: 10.3390/foods12030576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
Quinoa starch nanocrystals (QSNCs), obtained by acid hydrolysis, were used as a reinforcing filler in cassava starch films. The influence of QSNC concentrations (0, 2.5, 5.0, 7.5 and 10%, w/w) on the film's physical and surface properties was investigated. QSNCs exhibited conical and parallelepiped shapes. An increase of the QSNC concentration, from 0 to 5%, improved the film's tensile strength from 6.5 to 16.5 MPa, but at 7.5%, it decreased to 11.85 MPa. Adequate exfoliation of QSNCs in the starch matrix also decreased the water vapor permeability (~17%) up to a 5% concentration. At 5.0% and 7.5% concentrations, the films increased in roughness, water contact angle, and opacity, whereas the brightness decreased. Furthermore, at these concentrations, the film's hydrophilic nature changed (water contact angle values of >65°). The SNC addition increased the film opacity without causing major changes in color. Other film properties, such as thickness, moisture content and solubility, were not affected by the QSNC concentration. The DSC (differential scanning calorimetry) results indicated that greater QSNC concentrations increased the second glass transition temperature (related to the biopolymer-rich phase) and the melting enthalpy. However, the film's thermal stability was not altered by the QSNC addition. These findings contribute to overcoming the starch-based films' limitations through the development of nanocomposite materials for future food packaging applications.
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36
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Neuhaus SJ, Marino E, Murray CB, Kagan CR. Frequency Stabilization and Optically Tunable Lasing in Colloidal Quantum Dot Superparticles. Nano Lett 2023; 23:645-651. [PMID: 36602545 DOI: 10.1021/acs.nanolett.2c04498] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Self-assembled superparticles composed of colloidal quantum dots establish microsphere cavities that support optically pumped lasing from whispering gallery modes. Here, we report on the time- and excitation fluence-dependent lasing properties of CdSe/CdS quantum dot superparticles. Spectra collected under constant photoexcitation reveal that the lasing modes are not temporally stable but instead blue-shift by more than 30 meV over 15 min. To counter this effect, we establish a high-fluence light-soaking protocol that reduces this blue-shift by more than an order of magnitude to 1.7 ± 0.5 meV, with champion superparticles displaying mode blue-shifts of <0.5 meV. Increasing the pump fluence allows for optically controlled, reversible, color-tunable red-to-green lasing. Combining these two paradigms suggests that quantum dot superparticles could serve in applications as low-cost, robust, solution-processable, tunable microlasers.
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Affiliation(s)
- Steven J Neuhaus
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
| | - Emanuele Marino
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Via Archirafi 36, 90123Palermo, Italy
| | - Christopher B Murray
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
| | - Cherie R Kagan
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
- Department of Electrical and System Engineering, University of Pennsylvania, Philadelphia, Pennsylvania19104, United States
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Imura Y, Tanaka M, Kasuga A, Akiyama R, Ogawa D, Sugimori H, Morita-Imura C, Kawai T. Nanoarchitectonics and Catalytic Performance of Au-Pd Nanoflowers Supported on Fe 2O 3. J Oleo Sci 2023; 72:1055-1061. [PMID: 37914267 DOI: 10.5650/jos.ess23125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023] Open
Abstract
Supported anisotropic bimetallic nanocrystals are attractive owing to their potential for novel catalytic applications. Au-Pd nanocrystals are expected to have higher catalytic activity for alcohol oxidation than Au nanocrystals. However, only a few studies have reported the application of anisotropic Au-Pd nanocrystals as alcohol-oxidation nanocatalysts. Support materials such as Al2O3 and Fe2O3 influence the catalytic activity of spherical Au nanoparticles. Thus, optimization of the support is expected to improve the catalytic activity of anisotropic Au-Pd nanocrystals. Herein, we report the synthesis and catalytic performances of Al2O3- and Fe2O3-supported Au and Au-Pd nanoflowers. Au99-Pd1 NFs supported on Fe2O3 exhibited the highest catalytic activity for 1-phenylethyl alcohol oxidation.
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Affiliation(s)
- Yoshiro Imura
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| | - Masami Tanaka
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| | - Asuka Kasuga
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| | - Ryota Akiyama
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
| | - Daisuke Ogawa
- Technology Support Department, Tokyo Metropolitan Industrial Technology Research Institute
| | - Hirokazu Sugimori
- Technology Support Department, Tokyo Metropolitan Industrial Technology Research Institute
| | | | - Takeshi Kawai
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science
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Zhuo X, Margrethe Brekstad Kjellin M, Schaal Z, Zhang T, Löbmann K, Leng D. A Comparative Study between A Protein Based Amorphous Formulation and Other Dissolution Rate Enhancing Approaches: A Case Study with Rifaximin. Pharmaceutics 2022; 15. [PMID: 36678757 DOI: 10.3390/pharmaceutics15010126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/17/2022] [Accepted: 12/26/2022] [Indexed: 12/31/2022] Open
Abstract
Amorphous solid dispersions (ASDs) based on proteins as co-formers have previously shown promising potential to improve the solubility and bioavailability of poorly water-soluble drugs. In particular, whey proteins have shown to be promising co-formers and amorphous stabilizers in ASD formulations, including at high drug loading. In this study, the feasibility of the whey protein β-lactoglobulin (BLG) as a co-former in ASDs was compared to the more traditional ASD co-formers based on synthetic polymers (hydroxypropyl methylcellulose acetate succinate and Eudragit® L) as well as to a nanocrystalline formulation. The poorly water-soluble drug rifaximin (RFX) was chosen as the model drug. All drug/co-former formulations were prepared as fully amorphous ASDs by spray drying at 50% (w/w) drug loading. The BLG-based ASD had the highest glass transition temperature and showed a faster dissolution rate and higher drug solubility in three release media with different pH values (1.2, 4.5, and 6.5) compared to the polymer-based ASDs and the nanocrystalline RFX. In conclusion, BLG is a promising co-former and amorphous stabilizer of RFX in ASD formulations, superior to the selected polymer-based ASD systems or the nanocrystalline formulation.
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Gushchina I, Trepalin V, Zaitsev E, Ruth A, Kuno M. Excitation Intensity- and Size-Dependent Halide Photosegregation in CsPb(I 0.5Br 0.5) 3 Perovskite Nanocrystals. ACS Nano 2022; 16:21636-21644. [PMID: 36468911 DOI: 10.1021/acsnano.2c10781] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Although broad consensus exists that photoirradiation of mixed-halide lead perovskites leads to anion segregation, no model today fully rationalizes all aspects of this near ubiquitous phenomenon. Here, we quantitatively compare experimental, CsPb(I0.5Br0.5)3 nanocrystal (NC) terminal anion photosegregation stoichiometries and excitation intensity thresholds to a band gap-based, thermodynamic model of mixed-halide perovskite photosegregation. Mixed-halide NCs offer strict tests of theory given physical sizes, which dictate local photogenerated carrier densities. We observe that mixed-anion perovskite NCs exhibit significant robustness to photosegregation, with photosegregation propensity decreasing with decreasing NC size. Observed size- and excitation intensity-dependent photosegregation data agree with model predicted size- and excitation intensity-dependent terminal halide stoichiometries. Established correspondence between experiment and theory, in turn, suggests that mixed-halide perovskite photostabilities can be predicted a priori using local gradients of (empirical) Vegard's law expressions of composition-dependent band gaps.
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Affiliation(s)
- Irina Gushchina
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Vadim Trepalin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Evgenii Zaitsev
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
| | - Anthony Ruth
- CubicPV, 1807 Ross Avenue, STE 333, Dallas, Texas75201, United States
| | - Masaru Kuno
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States
- Department of Physics, University of Notre Dame, Notre Dame, Indiana46556, United States
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40
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Abstract
Lead halide perovskites have been attracting great attention due to their outstanding properties and have been utilized for a wide variety of applications. However, the high toxicity of lead promotes an urgent and necessary search for alternative nanomaterials. In this perspective, the emerging lead-free perovskites are an environmentally friendly and harmless option. The present work reports for the first time gas sensors based on lead-free perovskite nanocrystals supported on graphene, which acts as a transducing element owing to its high and efficient carrier transport properties. The use of nanocrystals enables achieving excellent sensitivity toward gas compounds and presents better properties than those of bulky perovskite thin films, owing to their quantum confinement effect and exciton binding energy. Specifically, an industrially scalable, facile, and inexpensive synthesis is proposed to support two different perovskites (Cs3CuBr5 and Cs2AgBiBr6) on graphene for effectively detecting a variety of harmful pollutants below the threshold limit values. H2 and H2S gases were detected for the first time by utilizing lead-free perovskites, and ultrasensitive detection of NO2 was also achieved at room temperature. In addition, the band-gap type, defect tolerance, and electronic surface traps at the nanocrystals were studied in detail for understanding the differences in the sensing performance observed. Finally, a comprehensive sensing mechanism is proposed.
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Affiliation(s)
- Juan Casanova-Chafer
- MINOS
Research Group, Department of Electronics Engineering, Universitat Rovira i Virgili, 43007Tarragona, Spain,
| | - Rocio Garcia-Aboal
- Instituto
de Tecnología Química (Universitat Politècnica
de València − Consejo Superior de Investigaciones Científicas), 46022Valencia, Spain,
| | - Pedro Atienzar
- Instituto
de Tecnología Química (Universitat Politècnica
de València − Consejo Superior de Investigaciones Científicas), 46022Valencia, Spain
| | - Eduard Llobet
- MINOS
Research Group, Department of Electronics Engineering, Universitat Rovira i Virgili, 43007Tarragona, Spain
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41
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Huang D, Gui J, Chen X, Yu R, Gong T, Zhang Z, Fu Y. Chondroitin Sulfate-Derived Paclitaxel Nanocrystal via π-π Stacking with Enhanced Stability and Tumor Targetability. ACS Appl Mater Interfaces 2022; 14:51776-51789. [PMID: 36350778 DOI: 10.1021/acsami.2c15881] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Nanocrystals with high drug loading have become a viable strategy for solubilizing drugs with poor aqueous solubility. It remains challenging, however, to synthesize nanocrystals with sufficient stability and targeting potential. Here, we report a novel nanocrystal platform synthesized using paclitaxel (PTX) and Fmoc-8-amino-3,6-dioxaoctanoic acid (Fmoc-AEEA)-conjugated chondroitin sulfate (CS) (CS-Fmoc) via π-π stacking to afford a stable formulation with CD44 targetability (PTX NC@CS-Fmoc). The PTX NC@CS-Fmoc exhibited rodlike shapes with an average hydrodynamic size of 173.6 ± 0.7 nm (PDI = 0.11 ± 0.04) and a drug loading of up to 31.3 ± 0.6%. Next, PTX NC@CS-Fmoc was subjected to lyophilization in the absence of cryoprotectants for long-term storage, and after redispersion, PTX NC@CS-Fmoc displayed an average hydrodynamic size of 205.3 ± 2.9 nm (PDI = 0.15 ± 0.01). In murine Panc02 cells, PTX NC@CS-Fmoc showed higher internalization efficiency than that of PTX nanocrystals without CS modification (PTX NC@F127) (P < 0.05) or that of CS-Fmoc micelles (P < 0.05). Moreover, PTX NC@CS-Fmoc appeared to accumulate in both lysosomes and Golgi apparatus, while CS-Fmoc micelles accumulated specifically in the Golgi apparatus. In the orthotopic Panc02 tumor-bearing mice model, PTX NC@CS-Fmoc showed higher tumor-specific accumulation than CS-Fmoc micelles, which also demonstrated comparable tumor growth inhibition as to Nab-PTX. Overall, the CS-Fmoc-derived nanocrystals represent a neat and viable formulation strategy for targeted chemotherapy with great potential for translational studies.
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Affiliation(s)
- Dandan Huang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
| | - Jiajia Gui
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
| | - Xue Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
| | - Ruilian Yu
- Department of Oncology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu610072, China
| | - Tao Gong
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
| | - Zhirong Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
| | - Yao Fu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu610041, China
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42
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Kandeel M, Sharaf M, Hamad AM, O Babalghith A, Abdalla M, Arif M, Binsuwaidan R, G M Attallah N, Aladl Aladl Aladl H, Selim S, Jaremko M. Novel Copper Oxide Bio- Nanocrystals to Target Outer Membrane Lectin of Vancomycin-Resistant Enterococcus faecium (VREfm): In Silico, Bioavailability, Antimicrobial, and Anticancer Potential. Molecules 2022; 27. [PMID: 36432057 DOI: 10.3390/molecules27227957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 11/19/2022]
Abstract
In present study, we used Olea europaea leaf extract to biosynthesize in situ Copper Oxide nanocrystals (CuO @OVLe NCs) with powerful antibacterial and anti-cancer capabilities. Physio-chemical analyses, such as UV/Vis, FTIR, XRD, EDX, SEM, and TEM, were applied to characterize CuO @OVLe NCs. The UV/Vis spectrum demonstrated a strong peak at 345 nm. Furthermore, FTIR, XRD, and EDX validated the coating operation's contact with colloidal CuO @OVLe NCs. According to TEM and SEM analyses, CuO @OVLe NCs exhibited a spherical shape and uniform distribution of size with aggregation, for an average size of ~75 nm. The nanoparticles demonstrated a considerable antibacterial effect against E. faecium bacterial growth, as well as an increased inhibition rate in a dose-dependent manner on the MCF-7, PC3, and HpeG2 cancer cell lines and a decreased inhibition rate on WRL-68. Molecular docking and MD simulation were used to demonstrate the high binding affinity of a ligand (Oleuropein) toward the lectin receptor complex of the outer membrane to vancomycin-resistant E. faecium (VREfm) via amino acids (Leu 195, Thr 288, His 165, and Ser 196). Hence, our results expand the accessibility of OVLe's bioactive components as a promising natural source for the manufacture of physiologically active components and the creation of green biosynthesis of metal nanocrystals.
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43
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Abadie C, Paggi L, Fabas A, Khalili A, Dang TH, Dabard C, Cavallo M, Alchaar R, Zhang H, Prado Y, Bardou N, Dupuis C, Xu XZ, Ithurria S, Pierucci D, Utterback JK, Fix B, Vincent G, Bouchon P, Lhuillier E. Helmholtz Resonator Applied to Nanocrystal-Based Infrared Sensing. Nano Lett 2022; 22:8779-8785. [PMID: 36190814 DOI: 10.1021/acs.nanolett.2c02769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
While the integration of nanocrystals as an active medium for optoelectronic devices progresses, light management strategies are becoming required. Over recent years, several photonic structures (plasmons, cavities, mirrors, etc.) have been coupled to nanocrystal films to shape the absorption spectrum, tune the directionality, and so on. Here, we explore a photonic equivalent of the acoustic Helmholtz resonator and propose a design that can easily be fabricated. This geometry combines a strong electromagnetic field magnification and a narrow channel width compatible with efficient charge conduction despite hopping conduction. At 80 K, the device reaches a responsivity above 1 A·W-1 and a detectivity above 1011 Jones (3 μm cutoff) while offering a significantly faster time-response than vertical geometry diodes.
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Affiliation(s)
- Claire Abadie
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Laura Paggi
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
| | - Alice Fabas
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
| | - Adrien Khalili
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Tung Huu Dang
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Corentin Dabard
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Mariarosa Cavallo
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Rodolphe Alchaar
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Huichen Zhang
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Yoann Prado
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Nathalie Bardou
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Christophe Dupuis
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS, Université Paris-Saclay, 10 Boulevard Thomas Gobert, 91120 Palaiseau, France
| | - Xiang Zhen Xu
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Sandrine Ithurria
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI-Paris, PSL Research University, Sorbonne Université Univ Paris 06, CNRS UMR 8213, 10 rue Vauquelin 75005 Paris, France
| | - Debora Pierucci
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - James K Utterback
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
| | - Baptiste Fix
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
| | - Grégory Vincent
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
| | - Patrick Bouchon
- DOTA, ONERA, Université Paris Saclay, F-91123 Palaiseau, France
| | - Emmanuel Lhuillier
- CNRS, Institut des NanoSciences de Paris, Sorbonne Université, 4 place jussieu, F-75005 Paris, France
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44
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Ward-O’Brien B, McNaughter PD, Cai R, Chattopadhyay A, Flitcroft JM, Smith CT, Binks DJ, Skelton JM, Haigh SJ, Lewis DJ. Quantum Confined High-Entropy Lanthanide Oxysulfide Colloidal Nanocrystals. Nano Lett 2022; 22:8045-8051. [PMID: 36194549 PMCID: PMC9614967 DOI: 10.1021/acs.nanolett.2c01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
We have synthesized the first reported example of quantum confined high-entropy (HE) nanoparticles, using the lanthanide oxysulfide, Ln2SO2, system as the host phase for an equimolar mixture of Pr, Nd, Gd, Dy, and Er. A uniform HE phase was achieved via the simultaneous thermolysis of a mixture of lanthanide dithiocarbamate precursors in solution. This was confirmed by powder X-ray diffraction and high-resolution scanning transmission electron microscopy, with energy dispersive X-ray spectroscopic mapping confirming the uniform distribution of the lanthanides throughout the particles. The nanoparticle dispersion displayed a significant blue shift in the absorption and photoluminescence spectra relative to our previously reported bulk sample with the same composition, with an absorption edge at 330 nm and a λmax at 410 nm compared to the absorption edge at 500 nm and a λmax at 450 nm in the bulk, which is indicative of quantum confinement. We support this postulate with experimental and theoretical analysis of the bandgap energy as a function of strain and surface effects (ligand binding) as well as calculation of the exciton Bohr radiii of the end member compounds.
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Affiliation(s)
- Brendan Ward-O’Brien
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Rongsheng Cai
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Amrita Chattopadhyay
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Joseph M. Flitcroft
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Charles T. Smith
- Department
of Physics and Astronomy and the Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Binks
- Department
of Physics and Astronomy and the Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Jonathan M. Skelton
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Sarah J. Haigh
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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45
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McVey BFP, Swain RA, Lagarde D, Ojo WS, Bakkouche K, Marcelot C, Warot B, Tison Y, Martinez H, Chaudret B, Nayral C, Delpech F. Cd 3P 2/Zn 3P 2 Core-Shell Nanocrystals: Synthesis and Optical Properties. Nanomaterials (Basel) 2022; 12:3364. [PMID: 36234492 PMCID: PMC9565233 DOI: 10.3390/nano12193364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/02/2022] [Accepted: 09/16/2022] [Indexed: 06/16/2023]
Abstract
II-V semiconductor nanocrystals such as Cd3P2 and Zn3P2 have enormous potential as materials in next-generation optoelectronic devices requiring active optical properties across the visible and infrared range. To date, this potential has been unfulfilled due to their inherent instability with respect to air and moisture. Core-shell system Cd3P2/Zn3P2 is synthesized and studied from structural (morphology, crystallinity, shell diameter), chemical (composition of core, shell, and ligand sphere), and optical perspectives (absorbance, emission-steady state and time resolved, quantum yield, and air stability). The improvements achieved by coating with Zn3P2 are likely due to its identical crystal structure to Cd3P2 (tetragonal), highlighting the key role crystallographic concerns play in creating cutting edge core-shell NCs.
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Affiliation(s)
- Benjamin F. P. McVey
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Robert A. Swain
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Delphine Lagarde
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Wilfried-Solo Ojo
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Kaltoum Bakkouche
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
- Euromed Research Center, Engineering Division, Euro-Med University of Fez (UEMF), Route de Meknes, Rond-Point de Bensouda, Fès 30070, Morocco
| | - Cécile Marcelot
- CEMES CNRS UPR 8011 and Université de Toulouse, 29 rue Jeanne Marvig, BP 94347, CEDEX 4, 31055 Toulouse, France
| | - Bénédicte Warot
- CEMES CNRS UPR 8011 and Université de Toulouse, 29 rue Jeanne Marvig, BP 94347, CEDEX 4, 31055 Toulouse, France
| | - Yann Tison
- Universite de Pau et des Pays de l’Adour, E2S UPPA, CNRS UMR 5254, IPREM, 64053 Pau, France; Electrochemical Energy Storage Network (RS2E), CNRS FR3459, 33 Rue Saint Leu, CEDEX, 80039 Amiens, France
| | - Hervé Martinez
- Universite de Pau et des Pays de l’Adour, E2S UPPA, CNRS UMR 5254, IPREM, 64053 Pau, France; Electrochemical Energy Storage Network (RS2E), CNRS FR3459, 33 Rue Saint Leu, CEDEX, 80039 Amiens, France
- Centrale Casablanca, Centre de Recherche Systèmes Complexes et Interaction, Bouskoura 27182, Morocco
| | - Bruno Chaudret
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Céline Nayral
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Fabien Delpech
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 Avenue de Rangueil, 31077 Toulouse, France
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46
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Chen H, Xu J, Wang Y, Wang D, Ferrer-Espada R, Wang Y, Zhou J, Pedrazo-Tardajos A, Yang M, Tan JH, Yang X, Zhang L, Sychugov I, Chen S, Bals S, Paulsson J, Yang Z. Color-Switchable Nanosilicon Fluorescent Probes. ACS Nano 2022; 16:15450-15459. [PMID: 36107985 DOI: 10.1021/acsnano.2c07443] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fluorescent probes are vital to cell imaging by allowing specific parts of cells to be visualized and quantified. Color-switchable probes (CSPs), with tunable emission wavelength upon contact with specific targets, are particularly powerful because they not only eliminate the need to wash away all unbound probe but also allow for internal controls of probe concentrations, thereby facilitating quantification. Several such CSPs exist and have proven very useful, but not for all key cellular targets. Here we report a pioneering CSP for in situ cell imaging using aldehyde-functionalized silicon nanocrystals (SiNCs) that switch their intrinsic photoluminescence from red to blue quickly when interacting with amino acids in live cells. Though conventional probes often work better in cell-free extracts than in live cells, the SiNCs display the opposite behavior and function well and fast in universal cell lines at 37 °C while requiring much higher temperature in extracts. Furthermore, the SiNCs only disperse in cytoplasm not nucleus, and their fluorescence intensity correlated linearly with the concentration of fed amino acids. We believe these nanosilicon probes will be promising tools to visualize distribution of amino acids and potentially quantify amino acid related processes in live cells.
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Affiliation(s)
- Huai Chen
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Jiang Xu
- Department of Systems Biology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Yaping Wang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Da Wang
- EMAT and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Raquel Ferrer-Espada
- Department of Systems Biology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Yutong Wang
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China
| | - Jingjian Zhou
- Department of Applied Physics, KTH Royal Institute of Technology, 11419 Stockholm, Sweden
| | - Adrián Pedrazo-Tardajos
- EMAT and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Mei Yang
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China
| | - Jia-Heng Tan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Xiaoyu Yang
- Department of Molecular Medicine, School of Medicine, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229, United States
| | - Lei Zhang
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L3G1, Canada
| | - Ilya Sychugov
- Department of Applied Physics, KTH Royal Institute of Technology, 11419 Stockholm, Sweden
| | - Shoudeng Chen
- Guangdong Provincial Key Laboratory of Biomedical Imaging, Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China
| | - Sara Bals
- EMAT and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Johan Paulsson
- Department of Systems Biology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Zhenyu Yang
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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47
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Li SJ, Su SL, Hu GJ, Zhao Q, Wei ZY, Tian Y, Wang CD, Lu X, Ping DH. The Formation Mechanism of Nanocrystals after Martensitic Transformation. Materials (Basel) 2022; 15:6258. [PMID: 36143569 PMCID: PMC9503926 DOI: 10.3390/ma15186258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/16/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Understanding the ultrafine substructure in freshly formed Fe-C martensite is the key point to reveal the real martensitic transformation mechanism. As-quenched martensite, whose transformation temperature is close to room temperature, has been investigated in detail by means of transmission electron microscopy (TEM) in this study. The observation results revealed that the freshly formed martensite after quenching is actually composed of ultrafine crystallites with a grain size of 1−2 nm. The present observation result matches well with the suggestion based on X-ray studies carried out one hundred years ago. Such nanocrystals are distributed throughout the entire martensite. The whole martensite shows a uniform contrast under both bright and dark field observation modes, irrespective of what observation directions are chosen. No defect contrast can be observed inside each nanocrystal. However, a body-centered cubic {112}<111>-type twinning relationship exists among the ultrafine α-Fe grains. Such ultrafine α-Fe grains or crystallites are the root cause of the fine microstructure formed in martensitic steels and high hardness after martensitic transformation. The formation mechanism of the ultrafine α-Fe grains in the freshly formed martensite will be discussed based on a new γ → α phase transformation mechanism.
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Affiliation(s)
- Song-Jie Li
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Shi-Long Su
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Guan-Jie Hu
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Qiang Zhao
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Zheng-Yu Wei
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Yun Tian
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Cheng-Duo Wang
- School of Materials Science and Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Xing Lu
- School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116026, China
| | - De-Hai Ping
- School of Chemical Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
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48
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Xu A, Huang Q, Luo K, Qin D, Xu W, Wang D, Hou L. Efficient Nanocrystal Photovoltaics with PTAA as Hole Transport Layer. Nanomaterials (Basel) 2022; 12:3067. [PMID: 36080104 PMCID: PMC9458081 DOI: 10.3390/nano12173067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
The power conversion efficiency (PCE) of solution-processed CdTe nanocrystals (NCs) solar cells has been significantly promoted in recent years due to the optimization of device design by advanced interface engineering techniques. However, further development of CdTe NC solar cells is still limited by the low open-circuit voltage (Voc) (mostly in range of 0.5-0.7 V), which is mainly attributed to the charge recombination at the CdTe/electrode interface. Herein, we demonstrate a high-efficiency CdTe NCs solar cell by using organic polymer poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) as the hole transport layer (HTL) to decrease the interface recombination and enhance the Voc. The solar cell with the architecture of ITO/ZnO/CdS/CdSe/CdTe/PTAA/Au was fabricated via a layer-by-layer solution process. Experimental results show that PTAA offers better back contact for reducing interface resistance than the device without HTL. It is found that a dipole layer is produced between the CdTe NC thin film and the back contact electrode; thus the built-in electric field (Vbi) is reinforced, allowing more efficient carrier separation. By introducing the PTAA HTL in the device, the open-circuit voltage, short-circuit current density and the fill factor are simultaneously improved, leading to a high PCE of 6.95%, which is increased by 30% compared to that of the control device without HTL (5.3%). This work suggests that the widely used PTAA is preferred as the excellent HTL for achieving highly efficient CdTe NC solar cells.
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Affiliation(s)
- Ao Xu
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Qichuan Huang
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Kaiying Luo
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Donghuan Qin
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Wei Xu
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Dan Wang
- State Key Laboratory of Luminescent Materials & Devices, Institute of Polymer Optoelectronic Materials & Devices, South China University of Technology, Guangzhou 510640, China
| | - Lintao Hou
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, China
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Jain U, Soni S, Chauhan N. Application of perovskites in bioimaging: the state-of-the-art and future developments. Expert Rev Mol Diagn 2022; 22:867-880. [PMID: 36254607 DOI: 10.1080/14737159.2022.2135990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Recently, the development of perovskite-based nanocrystals for sustainable applications in bioimaging and clinical diagnostics have become a very active area of research. From 2D hybrid to zero-dimensional quantum dots (QDs), perovskites along with a variety of characteristic features, specifically non-linear optoelectronics properties, have attracted enormous research attention. These characteristics can be tuned by the type of cations or anions and their ratio used in host perovskites. Carrier doping and chemical modifications are additional alternatives to control optical and magnetism in radiodiagnostics. AREA COVERED This review begins by explaining the physical phenomena associated with luminescence or optical features of novel perovskites in diagnostic applications. Moreover, reported oxide, halide, doped, and QDs-based nanoprobes were elaborated. At last, the need for novel perovskite development, for example, persistent luminescent and low cytotoxicity is discussed, and the futuristic perspective of perovskites in clinical diagnostics with real-time demonstration is explained. EXPERT OPINION Our article concludes that hybrid perovskites, including metal-free, core-shell nanocomposites-based, and alloy-based perovskites, exhibit tunable bandgap and high photoluminescence quantum yields which ultimately result in high optical features. However, given limited understanding of ion transport mechanisms and dependency on environmental conditions of the perovskites, more research is needed.
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Affiliation(s)
- Utkarsh Jain
- School of Health Sciences & Technology (SoHST), University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun 248007, India
| | - Shringika Soni
- Amity Institute of Nanotechnology (AINT), Amity University Uttar Pradesh (AUUP), Noida 201313, India
| | - Nidhi Chauhan
- School of Health Sciences & Technology (SoHST), University of Petroleum and Energy Studies (UPES), Bidholi, Dehradun 248007, India
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50
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Cho KH, Jain PK. Superionic Conduction in One-Dimensional Nanostructures. ACS Nano 2022; 16:12445-12451. [PMID: 35904553 DOI: 10.1021/acsnano.2c03732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nanostructuring has become a powerful tool for tuning the electronic properties of materials and enhancing transport. As an example of relevance to next-generation battery technologies, nanocrystals have shown promise for realizing fast-ion conduction in solids; however, dissipationless ion transport over extended length scales is hindered by lossy interfaces formed between nanocrystals in a solid. Here we address this challenge by exploiting one-dimensional nanostructures for ion transport. Superionic conduction, with a record-high ionic conductivity of ∼4 S/cm at 150 °C, is demonstrated in solid electrolytes fabricated from nanowires of the earth-abundant solid copper selenide. This quasi-one-dimensional ionic conductivity is ∼5× higher than that in bulk cuprous selenide. Nanoscale dimensions in the radial direction lower ion-hopping barriers, while mesoscopically long, interface-free transport paths are available for ion transport in the axial direction. One-dimensional nanostructures can exceptionally boost solid-state devices that rely on ion transport.
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Affiliation(s)
- Ki-Hyun Cho
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Prashant K Jain
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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