1
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Li X, Zhao J, Xiao H, Zhang H, Zhou M, Zhang X, Yan X, Tang A, Chen L. Multiparticle Synergistic Electrophoretic Deposition Strategy for High-Efficiency and High-Resolution Displays. ACS NANO 2024; 18:17715-17724. [PMID: 38916440 DOI: 10.1021/acsnano.4c03005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Colloidal nanoparticles offer unique photoelectric properties, making them promising for functional applications. Multiparticle systems exhibit synergistic effects on the functional properties of their individual components. However, precisely controlled assembly of multiparticles to form patterned building blocks for solid-state devices remains challenging. Here, we demonstrate a versatile multiparticle synergistic electrophoretic deposition (EPD) strategy to achieve controlled assembly, high-efficiency, and high-resolution patterns. Through elaborate surface design and charge regulation of nanoparticles, we achieve precise control over the particle distribution (gradient or homogeneous structure) in multiparticle films using the EPD technique. The multiparticle system integrates silicon oxide and titanium oxide nanoparticles, synergistically enhancing the emission efficiency of quantum dots to a high level in the field. Furthermore, we demonstrate the superiority of our strategy to integrate multiparticle into large-area full-color display panels with a high resolution over 1000 pixels per inch. The results suggest great potential for developing multiparticle systems and expanding diverse functional applications.
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Affiliation(s)
- Xuefei Li
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Jinyang Zhao
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Hui Xiao
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Hangchuan Zhang
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Miao Zhou
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Xin Zhang
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Xiaolin Yan
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
| | - Aiwei Tang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China
| | - Lixuan Chen
- Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen 518107, China
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2
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Nakai Y, Nagai Y, Okayasu Y, Kobayashi Y. Photodoping-based broadband photochromism of semiconductor nanocrystals under air operated by a supramolecular gel. Chem Commun (Camb) 2024; 60:6492-6495. [PMID: 38807473 DOI: 10.1039/d4cc01854k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
We herein report photodoping and thereby photochromism of semiconductor nanocrystals under air in a temperature-responsive supramolecular gel and its back reactions induced by direct heating or near-infrared photothermal conversion. We also present their application to the spatiotemporal patterning of photoluminescence.
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Affiliation(s)
- Yuki Nakai
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
| | - Yuki Nagai
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
| | - Yoshinori Okayasu
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
| | - Yoichi Kobayashi
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
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3
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Sheng Y, Chen P, Gao Y, He Y, Li J, Muhammad, Xie X, Cheng C, Yang J, Chang Y, Tong G, Jiang Y. Tuneable Efficient White Emission of Sb 3+/Mn 2+ Co-Doped Lead-Free Perovskites for Single-Component White Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19175-19183. [PMID: 38573052 DOI: 10.1021/acsami.4c00745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Inorganic lead-free perovskite nanocrystals (NCs) with broadband self-trapped exciton (STEs) emission and low toxicity have shown enormous application prospects in the field of display and lighting. However, white light-emitting diodes (WLEDs) based on a single-component material with high photoluminescence quantum yield (PLQY) remain challenging. Here, we demonstrate a novel codoping strategy by introducing Sb3+/Mn2+ ions to achieve the tuneable dual emission in lead-free perovskite Cs3InCl6 NCs. The PLQY increases to 59.64% after doping with Sb3+. The codoped Cs3InCl6 NCs exhibit efficient white light emission due to the energy transfer channel from STEs to Mn2+ ions with PLQY of 51.38%. Density functional theory (DFT) calculations have been used to verify deeply the effects of Sb3+/Mn2+ doping. WLEDs based on Sb3+/Mn2+-codoped Cs3InCl6 NCs are explored with color rendering index of 85.5 and color coordinate of (0.398, 0.445), which have been successfully applied as photodetector lighting sources. This work provides a new perspective for designing novel lead-free perovskites to achieve single-component WLEDs.
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Affiliation(s)
- Yuanyuan Sheng
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Ping Chen
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People's Republic of China
| | - Yanpeng Gao
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yong He
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Junchun Li
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Muhammad
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xiang Xie
- Jianghuai Advance Technology Center, Hefei 230000, People's Republic of China
| | - Chen Cheng
- School of Microelectronics, Hefei University of Technology, Hefei 230009, People's Republic of China
| | - Jingting Yang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yajing Chang
- State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei 230037, People's Republic of China
| | - Guoqing Tong
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
| | - Yang Jiang
- School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
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4
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Chu C, Hofman E, Gao C, Li S, Lin H, MacSwain W, Franck JM, Meulenberg RW, Chakraborty A, Zheng W. Inserting an "atomic trap" for directional dopant migration in core/multi-shell quantum dots. Chem Sci 2023; 14:14115-14123. [PMID: 38098727 PMCID: PMC10717451 DOI: 10.1039/d3sc04165d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 11/11/2023] [Indexed: 12/17/2023] Open
Abstract
Diffusion of atoms or ions in solid crystalline lattice is crucial in many areas of solid-state technology. However, controlling ion diffusion and migration is challenging in nanoscale lattices. In this work, we intentionally insert a CdZnS alloyed interface layer, with small cationic size mismatch with Mn(ii) dopant ions, as an "atomic trap" to facilitate directional (outward and inward) dopant migration inside core/multi-shell quantum dots (QDs) to reduce the strain from the larger cationic mismatch between dopants and host sites. Furthermore, it was found that the initial doping site/environment is critical for efficient dopant trapping and migration. Specifically, a larger Cd(ii) substitutional site (92 pm) for the Mn(ii) dopant (80 pm), with larger local lattice distortion, allows for efficient atomic trapping and dopant migration; while Mn(ii) dopant ions can be very stable with no significant migration when occupying a smaller Zn(ii) substitutional site (74 pm). Density functional theory calculations revealed a higher energy barrier for a Mn(ii) dopant hopping from the smaller Zn substitutional tetrahedral (Td) site as compared to a larger Cd substitutional Td site. The controlled dopant migration by "atomic trapping" inside QDs provides a new way to fine tune the properties of doped nanomaterials.
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Affiliation(s)
- Chun Chu
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Elan Hofman
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Chengpeng Gao
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Shuya Li
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Hanjie Lin
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Walker MacSwain
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - John M Franck
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
| | - Robert W Meulenberg
- Department of Physics and Astronomy and Frontier Institute for Research in Sensor Technologies, University of Maine Orono Maine 04469 USA
| | | | - Weiwei Zheng
- Department of Chemistry, Syracuse University Syracuse New York 13244 USA
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5
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Tozawa M, Miyamae C, Akiyoshi K, Kameyama T, Yamamoto T, Motomura G, Fujisaki Y, Uematsu T, Kuwabata S, Torimoto T. One-pot synthesis of Ag-In-Ga-S nanocrystals embedded in a Ga 2O 3 matrix and enhancement of band-edge emission by Na + doping. NANOSCALE ADVANCES 2023; 5:7057-7066. [PMID: 38059040 PMCID: PMC10696949 DOI: 10.1039/d3na00755c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 11/13/2023] [Indexed: 12/08/2023]
Abstract
I-III-VI-based semiconductor quantum dots (QDs) have been intensively explored because of their unique controllable optoelectronic properties. Here we report one-pot synthesis of Na-doped Ag-In-Ga-S (AIGS) QDs incorporated in a Ga2O3 matrix. The obtained QDs showed a sharp band-edge photoluminescence peak at 557 nm without a broad-defect site emission. The PL quantum yield (QY) of such QDs was 58%, being much higher than that of AIGS QDs without Na+ doping, 29%. The obtained Na-doped AIGS/Ga2O3 composite particles were used as an emitting layer of green QD light-emitted diodes. A sharp electroluminescence (EL) peak was observed at 563 nm, being similar to that in the PL spectrum of the QDs used. The external quantum efficiency of the device was 0.6%.
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Affiliation(s)
- Makoto Tozawa
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Chie Miyamae
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Kazutaka Akiyoshi
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Tatsuya Kameyama
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Takahisa Yamamoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
| | - Genichi Motomura
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
| | - Yoshihide Fujisaki
- Science & Technology Research Laboratories, Japan Broadcasting Corporation (NHK) 1-10-11 Kinuta, Setagaya-ku Tokyo 157-8510 Japan
| | - Taro Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Susumu Kuwabata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Suita Osaka 565-0871 Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University Suita Osaka 565-0871 Japan
| | - Tsukasa Torimoto
- Graduate School of Engineering, Nagoya University Chikusa-ku Nagoya 464-8603 Japan
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6
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Jia Z, Shi C, Yang X, Zhang J, Sun X, Guo Y, Ying X. QD-based fluorescent nanosensors: Production methods, optoelectronic properties, and recent food applications. Compr Rev Food Sci Food Saf 2023; 22:4644-4669. [PMID: 37680064 DOI: 10.1111/1541-4337.13236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/12/2023] [Accepted: 08/11/2023] [Indexed: 09/09/2023]
Abstract
Food quality and safety are crucial public health concerns with global significance. In recent years, a series of fluorescence detection technologies have been widely used in the detection/monitoring of food quality and safety. Due to the advantages of wide detection range, high sensitivity, convenient and fast detection, and strong specificity, quantum dot (QD)-based fluorescent nanosensors have emerged as preferred candidates for food quality and safety analysis. In this comprehensive review, several common types of QD production methods are introduced, including colloidal synthesis, self-assembly, plasma synthesis, viral assembly, electrochemical assembly, and heavy-metal-free synthesis. The optoelectronic properties of QDs are described in detail at the electronic level, and the effect of food matrices on QDs was summarized. Recent advancements in the field of QD-based fluorescent nanosensors for trace level detection and monitoring of volatile components, heavy metal ions, food additives, pesticide residues, veterinary-drug residues, other chemical components, mycotoxins, foodborne pathogens, humidity, and temperature are also thoroughly summarized. Moreover, we discuss the limitations of the QD-based fluorescent nanosensors and present the challenges and future prospects for developing QD-based fluorescent nanosensors. As shown by numerous publications in the field, QD sensors have the advantages of strong anti-interference ability, convenient and quick operation, good linear response, and wide detection range. However, the reported assays are laboratory-focused and have not been industrialized and commercialized. Promising research needs to examine the potential applications of bionanotechnology in QD-based fluorescent nanosensors, and focus on the development of smart packaging films, labeled test strips, and portable kits-based sensors.
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Affiliation(s)
- Zhixin Jia
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
- Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
- Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Beijing, China
- National Engineering Laboratory for Agri-product Quality Traceability, Beijing Academy of Agricultural and Forestry Sciences, Beijing, China
| | - Ce Shi
- Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
- Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Beijing, China
- National Engineering Laboratory for Agri-product Quality Traceability, Beijing Academy of Agricultural and Forestry Sciences, Beijing, China
| | - Xinting Yang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
- Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
- Key Laboratory of Cold Chain Logistics Technology for Agro-product, Ministry of Agriculture and Rural Affairs, Beijing, China
- National Engineering Laboratory for Agri-product Quality Traceability, Beijing Academy of Agricultural and Forestry Sciences, Beijing, China
| | - Jiaran Zhang
- School of Electrical and Information Engineering, Beijing University of Civil Engineering and Architecture, Daxing District, Beijing, China
| | - Xia Sun
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
| | - Yemin Guo
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong, China
| | - Xiaoguo Ying
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, Zhejiang, China
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7
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Freyer A, Tumiel TM, Smeaton M, Savitzky BH, Kourkoutis LF, Krauss TD. Heterogeneity in Cation Exchange Ag + Doping of CdSe Nanocrystals. ACS NANOSCIENCE AU 2023; 3:280-285. [PMID: 37601918 PMCID: PMC10436366 DOI: 10.1021/acsnanoscienceau.3c00010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/20/2023] [Accepted: 04/20/2023] [Indexed: 08/22/2023]
Abstract
Cation exchange is becoming extensively used for nanocrystal (NC) doping in order to produce NCs with unique optical and electronic properties. However, despite its ever-increasing use, the relationships between the cation exchange process, its doped NC products, and the resulting NC photophysics are not well characterized. For example, similar doping procedures on NCs with the same chemical compositions have resulted in quite different photophysics. Through a detailed single molecule investigation of a postsynthesis Ag+ doping of CdSe NCs, a number of species were identified within a single doped NC sample, suggesting the differences in the optical properties of the various synthesis methods are due to the varied contributions of each species. Electrostatic force microscopy (EFM), electron energy loss spectroscopy (EELS) mapping, and single molecule photoluminescence (PL) studies were used to identify four possible species resulting from the Ag+-CdSe cation exchange doping process. The heterogeneity of these samples shows the difficulty in controlling a postsynthesis cation exchange method to produce homogeneous samples needed for use in any potential application. Additionally, the heterogeneity in the doped samples demonstrates that significant care must be taken in describing the ensemble or average characteristics of the sample.
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Affiliation(s)
- Abigail Freyer
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United
States
| | - Trevor M. Tumiel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United
States
| | - Michelle Smeaton
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14853, United States
| | - Benjamin H. Savitzky
- Department
of Physics, Cornell University, Ithaca, New York 14853, United States
| | - Lena F. Kourkoutis
- School
of Applied and Engineering Physics, Cornell
University, Ithaca, New York 14853, United States
- Kavli Institute
at Cornell for Nanoscale Science, Cornell
University, Ithaca, New York 14853, United States
| | - Todd D. Krauss
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United
States
- The
Institute of Optics, University of Rochester, Rochester, New York 14627-0216, United
States
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8
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Chen T, Chen Y, Li Y, Liang M, Wu W, Wang Y. A Review on Multiple I-III-VI Quantum Dots: Preparation and Enhanced Luminescence Properties. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5039. [PMID: 37512312 PMCID: PMC10384050 DOI: 10.3390/ma16145039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023]
Abstract
I-III-VI type QDs have unique optoelectronic properties such as low toxicity, tunable bandgaps, large Stokes shifts and a long photoluminescence lifetime, and their emission range can be continuously tuned in the visible to near-infrared light region by changing their chemical composition. Moreover, they can avoid the use of heavy metal elements such as Cd, Hg and Pb and highly toxic anions, i.e., Se, Te, P and As. These advantages make them promising candidates to replace traditional binary QDs in applications such as light-emitting diodes, solar cells, photodetectors, bioimaging fields, etc. Compared with binary QDs, multiple QDs contain many different types of metal ions. Therefore, the problem of different reaction rates between the metal ions arises, causing more defects inside the crystal and poor fluorescence properties of QDs, which can be effectively improved by doping metal ions (Zn2+, Mn2+ and Cu+) or surface coating. In this review, the luminous mechanism of I-III-VI type QDs based on their structure and composition is introduced. Meanwhile, we focus on the various synthesis methods and improvement strategies like metal ion doping and surface coating from recent years. The primary applications in the field of optoelectronics are also summarized. Finally, a perspective on the challenges and future perspectives of I-III-VI type QDs is proposed as well.
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Affiliation(s)
- Ting Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yuanhong Chen
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Youpeng Li
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Mengbiao Liang
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Wenkui Wu
- Institute of Materials Science & Devices, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Yude Wang
- National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University, Kunming 650504, China
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9
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Mulder AJ, Tilbury RD, Werrett MV, Wright PJ, Patel P, Becker T, Jones F, Stagni S, Jia G, Massi M, Buntine MA. Ligand-Mediated Control of the Surface Oxidation States of Copper Nanoparticles Produced by Laser Ablation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5156-5168. [PMID: 36995293 DOI: 10.1021/acs.langmuir.3c00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
We report on studies that demonstrate how the chemical composition of the surface of copper nanoparticles (CuNPs) - in terms of percentage copper(I/II) oxides - can be varied by the presence of N-donor ligands during their formation via laser ablation. Changing the chemical composition thus allows systematic tuning of the surface plasmon resonance (SPR) transition. The trialed ligands include pyridines, tetrazoles, and alkylated tetrazoles. CuNPs formed in the presence of pyridines, and alkylated tetrazoles exhibit a SPR transition only slightly blue shifted with respect to CuNPs formed in the absence of any ligand. On the other hand, the presence of tetrazoles results in CuNPs characterized by a significant blue shift of the order of 50-70 nm. By comparing these data also with the SPR of CuNPs formed in the presence of carboxylic acids and hydrazine, this work demonstrates that the blue shift in the SPR is due to tetrazolate anions providing a reducing environment to the nascent CuNPs, thus preventing the formation of copper(II) oxides. This conclusion is further supported by the fact that both AFM and TEM data indicate only small variations in the size of the nanoparticles, which is not enough to justify a 50-70 nm blue-shift of the SPR transition. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) studies further confirm the absence of Cu(II)-containing CuNPs when prepared in the presence of tetrazolate anions.
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Affiliation(s)
- Ashley J Mulder
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Rhys D Tilbury
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Melissa V Werrett
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Phillip J Wright
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Payal Patel
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Thomas Becker
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Franca Jones
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Stefano Stagni
- Department of Industrial Chemistry "Toso Montanari", University of Bologna, viale del Risorgimento 4, Bologna 40136, Italy
| | - Guohua Jia
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Massimiliano Massi
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
| | - Mark A Buntine
- Department of Chemistry, Curtin University, GPO Box U1987 Perth, WA 6845, Australia
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10
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Li YL, Sheng PT, Li FA, Bai RB, Gao XM, Han YJ. Bifunctional Supertetrahedral Chalcogenolate Cluster-Based Assembly Materials Constructed by a Photoactive Ligand. Inorg Chem 2023; 62:4043-4047. [PMID: 36847330 DOI: 10.1021/acs.inorgchem.2c03927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
The assembly of supertetrahedral chalcogenolate clusters (SCCs) and multifunctional organic linkers could lead to the formation of tunable structures and synergistic properties. Two SCC-based assembled materials (SCCAM-1 and -2) constructed by a triangular chromophore ligand, tris(4-pyridylphenyl)amine, were successfully synthesized and characterized. The SCCAMs demonstrate unusually long-lived afterglow at low temperatures (83 K) and efficient activities for the photocatalytic degradation of organic dye in water.
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Affiliation(s)
- Yan-Ling Li
- College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
| | - Peng-Tao Sheng
- College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
| | - Fu-An Li
- College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
| | - Rui-Bing Bai
- College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
| | - Xian-Ming Gao
- Henan Shenma Nylon Chemical Limited Liability Company, Pingdingshan 467000, China
| | - Yong-Jun Han
- College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China
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11
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Zhang S, Yi X, Hu G, Chen M, Shen H, Li B, Yang L, Dai W, Zou J, Luo S. Configuration regulation of active sites by accurate doping inducing self-adapting defect for enhanced photocatalytic applications: A review. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Lin M, Chen H, Zhang Z, Wang X. Engineering interface structures for heterojunction photocatalysts. Phys Chem Chem Phys 2023; 25:4388-4407. [PMID: 36723139 DOI: 10.1039/d2cp05281d] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Solar photocatalysis is the most ideal solution to global energy concerns and environmental deterioration nowadays. The heterojunction combination has become one of the most successful and effective strategies to design and manufacture composite photocatalysts. Heterojunction structures are widely documented to markedly improve the photocatalytic behavior of materials by enhancing the separation and transfer of photogenerated charges, widening the light absorption range, and broadening redox potentials, which are attributed to the presence of both build-in electric fields at the interface of two different materials and the complementarity between different electron structures. So far, a large number of heterojunction photocatalytic materials have been reported and applied for water splitting, reduction of carbon dioxide and nitrogen, environmental cleaning, etc. This review outlines the recent accomplishments in the design and modification of interface structures in heterojunction photocatalysts, aiming to provide some useful perspectives for future research in this field.
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Affiliation(s)
- Min Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Hui Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Zizhong Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350106, P. R. China. .,Qingyuan Innovation Laboratory, Quanzhou, 362801, P. R. China
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13
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Xu Y, Yu S, Tong F, Wang Z, Wang P, Liu Y, Cheng H, Fan Y, Wei W, Dai Y, Zheng Z, Huang B. Dual-plasmon-enhanced nitrophenol hydrogenation over W 18O 49–Au heterostructures studied at the single-particle level. Catal Sci Technol 2023. [DOI: 10.1039/d2cy02071h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The dual-plasmonic W18O49–Au heterostructure exhibited enhanced catalytic performance in nitrophenol hydrogenation. The HEI process and coupling effect were demonstrated by single-particle spectroscopy and FDTD simulation.
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Affiliation(s)
- Yayang Xu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Shiqiang Yu
- School of Physics, Shandong University, Jinan 250100, China
| | - Fengxia Tong
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Zeyan Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Peng Wang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yuanyuan Liu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Hefeng Cheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yuchen Fan
- Department of Hepatology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250100, China
| | - Wei Wei
- School of Physics, Shandong University, Jinan 250100, China
| | - Ying Dai
- School of Physics, Shandong University, Jinan 250100, China
| | - Zhaoke Zheng
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Baibiao Huang
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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14
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Hu H, Xu Q, Mo Z, Hu X, He Q, Zhang Z, Xu Z. New anti-cancer explorations based on metal ions. J Nanobiotechnology 2022; 20:457. [PMID: 36274142 PMCID: PMC9590139 DOI: 10.1186/s12951-022-01661-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/03/2022] [Indexed: 12/07/2022] Open
Abstract
AbstractDue to the urgent demand for more anti-cancer methods, the new applications of metal ions in cancer have attracted increasing attention. Especially the three kinds of the new mode of cell death, including ferroptosis, calcicoptosis, and cuproptosis, are of great concern. Meanwhile, many metal ions have been found to induce cell death through different approaches, such as interfering with osmotic pressure, triggering biocatalysis, activating immune pathways, and generating the prooxidant effect. Therefore, varieties of new strategies based on the above approaches have been studied and applied for anti-cancer applications. Moreover, many contrast agents based on metal ions have gradually become the core components of the bioimaging technologies, such as MRI, CT, and fluorescence imaging, which exhibit guiding significance for cancer diagnosis. Besides, the new nano-theranostic platforms based on metal ions have experimentally shown efficient response to endogenous and exogenous stimuli, which realizes simultaneous cancer therapy and diagnosis through a more controlled nano-system. However, most metal-based agents have still been in the early stages, and controlled clinical trials are necessary to confirm or not the current expectations. This article will focus on these new explorations based on metal ions, hoping to provide some theoretical support for more anti-cancer ideas.
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15
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Chen Y, Zhang Y, Lu R, Bailey TP, Uher C, Poudeu PFP. Unusual electronic transport in (1 - x)Cu 2Se-( x)CuInSe 2 hierarchical composites. NANOSCALE ADVANCES 2022; 4:4279-4290. [PMID: 36321155 PMCID: PMC9552873 DOI: 10.1039/d2na00230b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 08/19/2022] [Indexed: 06/16/2023]
Abstract
The ability to control the relative density of electronic point defects as well as their energy distribution in semiconductors could afford a systematic modulation of their electronic, optical, and optoelectronic properties. Using a model binary hybrid system Cu2Se-CuInSe2, we have investigated the correlation between phase composition, microstructure, and electronic transport behavior in the synthesized composites. We found that both Cu2Se and CuInSe2 phases coexist at multiple length scales, ranging from sub-ten nanometer to several micrometers, leading to the formation of a hybrid hierarchical microstructure. Astonishingly, the electronic phase diagram of the (1 - x)Cu2Se-(x)CuInSe2 (15% ≤ x ≤ 100%) hierarchical composites remarkably deviates from the trend normally expected for composites between a heavily doped semiconductor (Cu2Se) and a poorly conducting phase (CuInSe2). A sudden 3-fold increase in the electrical conductivity and carrier concentration along with a marginal increase in the carrier mobility is observed for composites at the vicinity of equimolar composition (48% ≤ x ≤ 52%). The carrier concentration increases from ∼1.5 × 1020 cm-3 for the composites with x ≤ 45% to 5.0 × 1020 cm-3 for x = 50%, and remains constant at 4.5 × 1020 cm-3 with x value in the range of 52% < x ≤ 90%, then quickly drops to 8 × 1018 cm-3 for pristine CuInSe2 phase (x = 100%). The atypical electronic behavior was rationalized in the light of the formation of an inter-band (IB) within the band gap, which arises from the hybridization of native electronic point defects from both Cu2Se and CuInSe2 phases in the resulting hierarchical composites. The result points to a new strategy to modulate the electronic structure of semiconductor composites to maximize interaction and coupling between two fundamentally contrasting properties enabling access to electronic hybrid systems with potential applications as interactive and stimuli-responsive multifunctional materials.
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Affiliation(s)
- Yixuan Chen
- Laboratory for Emerging Energy and Electronic Materials (LE3M), Department of Materials Science and Engineering, University of Michigan Ann Arbor MI 48109 USA +1-734-763-4788
- Department of Chemical Engineering, University of Michigan Ann Arbor MI 48109 USA
| | - Yinying Zhang
- Department of Physics, University of Michigan Ann Arbor MI 48109 USA
| | - Ruiming Lu
- Laboratory for Emerging Energy and Electronic Materials (LE3M), Department of Materials Science and Engineering, University of Michigan Ann Arbor MI 48109 USA +1-734-763-4788
| | - Trevor P Bailey
- Department of Physics, University of Michigan Ann Arbor MI 48109 USA
| | - Ctirad Uher
- Department of Physics, University of Michigan Ann Arbor MI 48109 USA
| | - Pierre F P Poudeu
- Laboratory for Emerging Energy and Electronic Materials (LE3M), Department of Materials Science and Engineering, University of Michigan Ann Arbor MI 48109 USA +1-734-763-4788
- Department of Chemical Engineering, University of Michigan Ann Arbor MI 48109 USA
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16
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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: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [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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17
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Chakraborty S, Mandal P, Viswanatha R. Photoluminescence Quenching in CsPbCl 3 upon Fe Doping: Colloidal Synthesis, Structural and Optical Properties. Chem Asian J 2022; 17:e202200478. [PMID: 35696351 DOI: 10.1002/asia.202200478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/13/2022] [Indexed: 11/06/2022]
Abstract
Doped perovskite lead halide nanocrystals (PHNCs) are promising materials for various optoelectronic applications, but the major challenge faced by the researchers is the inability to dope foreign elements into perovskite lattice because of the strong lead-halide bond energies. In this work, we have used Fe as a dopant in CsPbCl3 to explore different doping techniques based on the colloidal synthesis of PHNCs to investigate the advantages and disadvantages of different techniques. We are able to dope a relatively higher amount of Fe (∼10%) than reported and observe clear optical signatures when the precursor does not have pre-existing Pb-Cl bonds. We prove that there are two competing processes inside a doped PHNC - one is the effect of dopant energy levels, and the other is surface passivation by halide ions. Using the most optimal synthesis strategy, we show that although Fe does act as a luminescence quencher in perovskite similar to II-VI quantum dots (QDs), the quenching requires much more Fe compared to trace amounts of Fe required in traditional QDs. Our work will assist in giving an overall comparative idea of doping and finding the most optimized strategy and help identify the underlying physical processes in perovskite based QDs.
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Affiliation(s)
- Saptarshi Chakraborty
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
| | - Prasenjit Mandal
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
| | - Ranjani Viswanatha
- New Chemistry Unit, bInternational Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore, 560064, India
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18
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Nasipuri D, Patra A, Bera S, Dutta SK, Pradhan N. Nucleophile-Controlled Halide Release from the Substitution Reaction of Haloketone for Facet Tuning and Manganese Doping in CsPbCl 3 Nanocrystals. J Phys Chem Lett 2022; 13:4506-4512. [PMID: 35575707 DOI: 10.1021/acs.jpclett.2c01084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Halide content of the reaction medium not only enhances the brightness of CsPbCl3 nanocrystals but also, control the shape modulations as well as doping Mn(II) in these host nanocrystals. Correlating both the shape effect and doping, herein, an in situ reaction of nucleophile-controlled halide release was explored for monitoring facets modulations and doping in CsPbCl3 nanocrystals. This was performed using alkyl amine as nucleophile which reacted with α-halo ketone, phenacyl chloride, to release chloride ions. Increase in amine concentration which released more Cl ions, reduced the possibility of shape transformation from perfect to truncated cubes during annealing. Similarly, for Mn(II) doping, the dopant photoluminescence intensity remained directly proportional to the amount of introduced amine nucleophiles. Quality of both doped and undoped nanocrystals obtained in this procedure remained unparallel and the method provided a strong correlation of rate of halide release with both facet modulations and doping in these nanocrystals.
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Affiliation(s)
- Diptam Nasipuri
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Avijit Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sumit Kumar Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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19
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Ma Y, Li Q, Wang S, Wang Y, Liu H, Wang X, Zhao B, Jiang Z, Ruan W. Observation of tunable surface plasmon resonances and surface enhanced infrared absorption (SEIRA) based on indium tin oxide (ITO) nanoparticle substrates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 271:120914. [PMID: 35074675 DOI: 10.1016/j.saa.2022.120914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/09/2022] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
The application of surface enhanced infrared absorption (SEIRA) is severely restricted in many fields due to the SEIRA substrates are constructed mainly from expensive noble metals. Therefore, the development of new SEIRA substrates other than the noble metallic ones is very valuable. Here we introduced a new semiconductor SEIRA substrate, the indium tin oxide (ITO) nanoparticles (NPs), to study the SEIRA property. The results demonstrate that the ITO NPs show the SEIRA property and the enhancement is dependent to the doping ratio of the heteroatoms of tin. The ITO NPs with the 5% atomic doping ratio show the highest SEIRA enhancement factor (EF), which is about 24. The limit of detection (LOD) of the 1,1'-dicarboxyferrocene (dcFc) molecule was as low as 10-5 mol/L. The present study proves that the tin-doped indium oxide can be used as a new and inexpensive semiconductor SEIRA substrate. It also proves that the doped semiconductor NPs have strong potentials for being used as emerging SEIRA substrates.
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Affiliation(s)
- Yan Ma
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Qianwen Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Siyu Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yanan Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Hongye Liu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xu Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Ziping Jiang
- Department of Hand and Foot Surgery, First Hospital of Jilin University, Jilin University, Changchun 130021, P. R. China.
| | - Weidong Ruan
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130012, P. R. China.
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20
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Li J, Guo Z, Xiao S, Tu Y, He T, Zhang W. Enhanced Performance of Two-Photon Excited Amplified Spontaneous Emission by Cd-Alloyed CsPbBr 3 Nanocrystals. Inorg Chem 2022; 61:4735-4742. [PMID: 35266707 DOI: 10.1021/acs.inorgchem.2c00077] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It has been demonstrated that the alloyed perovskite nanocrystals (NCs) with a small amount of Cd element may passivate the inherent halide vacancies in perovskite NCs and improve their stability. However, the study of the optical properties of such alloyed perovskite NCs still remains essentially untouched, which will seriously hinder relevant applications. Herein, using different amounts of CdBr2 as an alloyed metal precursor, a series of CsPbxCd1-xBr3 NCs (x = 1, 0.93, and 0.88) were synthesized. Compared with bare CsPbBr3 NCs, the Cd-alloyed NCs exhibited a near-unity photoluminescence quantum yield (99%), efficiently improved stability, and enhanced electron-phonon coupling strength. As the Cd-alloyed amount was increased, their hot-carrier cooling time became faster and the exciton-biexciton interaction decreased, causing a decreased threshold of two-photon excited amplified spontaneous emission (ASE) from 1.58 to 1.23 mJ cm-2. In addition, the Cd-alloying method can also improve the photostability of ASE, resulting in the initial ASE intensity remaining at 90% even after 7.5 × 105 pulse shots. This work implies that the Cd-alloyed CsPbBr3 NCs will be promising for application in a laser gain medium.
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Affiliation(s)
- Junzi Li
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Zhihang Guo
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shuyu Xiao
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yudi Tu
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Tingchao He
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Wenjing Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
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21
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Otero-Martínez C, Ye J, Sung J, Pastoriza-Santos I, Pérez-Juste J, Xia Z, Rao A, Hoye RLZ, Polavarapu L. Colloidal Metal-Halide Perovskite Nanoplatelets: Thickness-Controlled Synthesis, Properties, and Application in Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107105. [PMID: 34775643 DOI: 10.1002/adma.202107105] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/09/2021] [Indexed: 05/20/2023]
Abstract
Colloidal metal-halide perovskite nanocrystals (MHP NCs) are gaining significant attention for a wide range of optoelectronics applications owing to their exciting properties, such as defect tolerance, near-unity photoluminescence quantum yield, and tunable emission across the entire visible wavelength range. Although the optical properties of MHP NCs are easily tunable through their halide composition, they suffer from light-induced halide phase segregation that limits their use in devices. However, MHPs can be synthesized in the form of colloidal nanoplatelets (NPls) with monolayer (ML)-level thickness control, exhibiting strong quantum confinement effects, and thus enabling tunable emission across the entire visible wavelength range by controlling the thickness of bromide or iodide-based lead-halide perovskite NPls. In addition, the NPls exhibit narrow emission peaks, have high exciton binding energies, and a higher fraction of radiative recombination compared to their bulk counterparts, making them ideal candidates for applications in light-emitting diodes (LEDs). This review discusses the state-of-the-art in colloidal MHP NPls: synthetic routes, thickness-controlled synthesis of both organic-inorganic hybrid and all-inorganic MHP NPls, their linear and nonlinear optical properties (including charge-carrier dynamics), and their performance in LEDs. Furthermore, the challenges associated with their thickness-controlled synthesis, environmental and thermal stability, and their application in making efficient LEDs are discussed.
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Affiliation(s)
- Clara Otero-Martínez
- CINBIO, Universidade de Vigo, Materials Chemistry and Physics Group, Department of Physical Chemistry, Campus Universitario Lagoas, Marcosende, Vigo, 36310, Spain
- CINBIO, Universidade de Vigo, Deparment of Physical Chemistry, Campus Universitario Lagoas, Marcosende, Vigo, 36310, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur). SERGAS-UVIGO, Vigo, 36310, Spain
| | - Junzhi Ye
- Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Jooyoung Sung
- Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Department of Emerging Materials Science, DGIST, Daegu, 42988, Republic of Korea
| | - Isabel Pastoriza-Santos
- CINBIO, Universidade de Vigo, Deparment of Physical Chemistry, Campus Universitario Lagoas, Marcosende, Vigo, 36310, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur). SERGAS-UVIGO, Vigo, 36310, Spain
| | - Jorge Pérez-Juste
- CINBIO, Universidade de Vigo, Deparment of Physical Chemistry, Campus Universitario Lagoas, Marcosende, Vigo, 36310, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur). SERGAS-UVIGO, Vigo, 36310, Spain
| | - Zhiguo Xia
- School of Physics and Optoelectronics, State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou, Guangdong, 510641, P. R. China
| | - Akshay Rao
- Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK
| | - Robert L Z Hoye
- Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK
| | - Lakshminarayana Polavarapu
- CINBIO, Universidade de Vigo, Materials Chemistry and Physics Group, Department of Physical Chemistry, Campus Universitario Lagoas, Marcosende, Vigo, 36310, Spain
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22
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Li X, Su M, Wang YC, Xu M, Tong M, Haigh SJ, Zhang J. Telluride Nanocrystals with Adjustable Amorphous Shell Thickness and Core-Shell Structure Modulation by Aqueous Cation Exchange. Inorg Chem 2022; 61:3989-3996. [PMID: 35191681 DOI: 10.1021/acs.inorgchem.1c03675] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Engineering the structure of core-shell colloidal semiconductor nanoparticles (CSNPs) is attractive due to the potential to enhance photo-induced charge transfer and induce favorable optical and electronic properties. Nonetheless, the sensitivity of telluride CSNPs to high temperatures makes it challenging to precisely modulate their surface crystallinity. Herein, we have developed an efficient strategy for synthesizing telluride CSNPs with thin amorphous shells using aqueous cation exchange (ACE). By changing the synthesis temperature in the range of 40-110 °C, the crystallinity of the CdTe nanoparticles was controllable from perfect crystals with no detectable amorphous shell (c-CdTe) to a core-shell structure with a crystalline CdTe NP core covered by an amorphous shell of tunable thickness up to 7-8 nm (c@a-CdTe). A second ACE step transformed c@a-CdTe to crystalline CdTe@HgTe core-shell NPs. The c@a-CdTe nanoparticles synthesized at 60 °C and having a 4-5 nm thick amorphous shell exhibited the highest surface-enhanced Raman scattering activity with a high enhancement factor around 8.82 × 105, attributed to the coupling between the amorphous shell and the crystalline core.
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Affiliation(s)
- Xinyuan Li
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Mengyao Su
- Institute of Engineering Medicine, Beijing Institute of Technology, Beijing 100081, China
| | - Yi-Chi Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.,Department of Materials, University of Manchester, Manchester M13 9PL, U.K
| | - Meng Xu
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Minman Tong
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Sarah J Haigh
- Department of Materials, University of Manchester, Manchester M13 9PL, U.K
| | - Jiatao Zhang
- Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications, School of Materials Science & Engineering, MOE Key Laboratory of Cluster Science, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
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23
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Ezendam S, Herran M, Nan L, Gruber C, Kang Y, Gröbmeyer F, Lin R, Gargiulo J, Sousa-Castillo A, Cortés E. Hybrid Plasmonic Nanomaterials for Hydrogen Generation and Carbon Dioxide Reduction. ACS ENERGY LETTERS 2022; 7:778-815. [PMID: 35178471 PMCID: PMC8845048 DOI: 10.1021/acsenergylett.1c02241] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 01/07/2022] [Indexed: 05/05/2023]
Abstract
The successful development of artificial photosynthesis requires finding new materials able to efficiently harvest sunlight and catalyze hydrogen generation and carbon dioxide reduction reactions. Plasmonic nanoparticles are promising candidates for these tasks, due to their ability to confine solar energy into molecular regions. Here, we review recent developments in hybrid plasmonic photocatalysis, including the combination of plasmonic nanomaterials with catalytic metals, semiconductors, perovskites, 2D materials, metal-organic frameworks, and electrochemical cells. We perform a quantitative comparison of the demonstrated activity and selectivity of these materials for solar fuel generation in the liquid phase. In this way, we critically assess the state-of-the-art of hybrid plasmonic photocatalysts for solar fuel production, allowing its benchmarking against other existing heterogeneous catalysts. Our analysis allows the identification of the best performing plasmonic systems, useful to design a new generation of plasmonic catalysts.
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Affiliation(s)
- Simone Ezendam
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Matias Herran
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Lin Nan
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Christoph Gruber
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Yicui Kang
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Franz Gröbmeyer
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Rui Lin
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Julian Gargiulo
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Ana Sousa-Castillo
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
| | - Emiliano Cortés
- Faculty
of Physics, Ludwig-Maximilians-Universität, 80539 München, Germany
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24
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Zhang J, Zhang L, Zhang Q. Element doping-induced effects in Zn-doped CdTe quantum-dot system: Insights from an ultrafast dynamics perspective. J Chem Phys 2022; 156:034701. [DOI: 10.1063/5.0078477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Jiachen Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Lei Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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25
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Singh A, Amiji MM. Application of nanotechnology in medical diagnosis and imaging. Curr Opin Biotechnol 2022; 74:241-246. [PMID: 34995920 DOI: 10.1016/j.copbio.2021.12.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/11/2021] [Accepted: 12/19/2021] [Indexed: 11/28/2022]
Abstract
Nanotechnology has tremendously impacted the advancement in imaging, early detection, diagnosis, and prognosis of diseases by improving upon existing clinically relevant technologies. The unique biophysical properties of the nanoparticles enable contrast enhancement to improve biomedical imaging while our ability to manipulate nanoparticles for molecular level specificity enables tissue-specific diagnosis. Importantly, subtle variation in size or composition of the nanoparticles can result in great changes in their optical, magnetic or electrical properties that allows unique possibility of multiplexing. This concise but focused review summarizes the important classes of nanoparticles that have been actively used in improving our ability to image diseased tissues and have contributed to develop technologies that has led to early detection and diagnosis of diseases.
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Affiliation(s)
- Amit Singh
- Intergalactic Therapeutics, 40 Guest Street, Boston, MA 02135, USA
| | - Mansoor M Amiji
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences and Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA 02115, USA.
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26
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Dagar P, Kumar S, Ganguli AK. Effect of Mn 2+ incorporation on the photoelectrochemical properties of BiVO 4. NEW J CHEM 2022. [DOI: 10.1039/d1nj05292f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Mn2+–BiVO4 photoanodes (Mn2+ = 0.2–1%) to improve the charge-carrier separation and electrical conductivity of BiVO4 are reported.
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Affiliation(s)
- Preeti Dagar
- Institute of Nano Science and Technology, Sector-81, Knowledge City, Sahibzada Ajit Singh Nagar, Punjab 140306, India
| | - Sandeep Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Ashok Kumar Ganguli
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
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27
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Montanarella F, McCall KM, Sakhatskyi K, Yakunin S, Trtik P, Bernasconi C, Cherniukh I, Mannes D, Bodnarchuk MI, Strobl M, Walfort B, Kovalenko MV. Highly Concentrated, Zwitterionic Ligand-Capped Mn 2+:CsPb(Br x Cl 1-x ) 3 Nanocrystals as Bright Scintillators for Fast Neutron Imaging. ACS ENERGY LETTERS 2021; 6:4365-4373. [PMID: 34917771 PMCID: PMC8669634 DOI: 10.1021/acsenergylett.1c01923] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/08/2021] [Indexed: 05/21/2023]
Abstract
Fast neutron imaging is a nondestructive technique for large-scale objects such as nuclear fuel rods. However, present detectors are based on conventional phosphors (typically microcrystalline ZnS:Cu) that have intrinsic drawbacks, including light scattering, γ-ray sensitivity, and afterglow. Fast neutron imaging with colloidal nanocrystals (NCs) was demonstrated to eliminate light scattering. While lead halide perovskite (LHP) FAPbBr3 NCs emitting brightly showed poor spatial resolution due to reabsorption, the Mn2+-doped CsPb(BrCl)3 NCs with oleyl ligands had higher resolution because of large apparent Stokes shift but insufficient concentration for high light yield. In this work, we demonstrate a NC scintillator that features simultaneously high quantum yields, high concentrations, and a large apparent Stokes shift. In particular, we use long-chain zwitterionic ligand capping in the synthesis of Mn2+-doped CsPb(BrCl)3 NCs that allows for attaining very high concentrations (>100 mg/mL) of colloids. The emissive behavior of these ASC18-capped NCs was carefully controlled by compositional tuning that permitted us to select for high quantum yields (>50%) coinciding with Mn-dominated emission for minimal self-absorption. These tailored Mn2+:CsPb(BrCl)3 NCs demonstrated over 8 times brighter light yield than their oleyl-capped variants under fast neutron irradiation, which is competitive with that of near-unity FAPbBr3 NCs, while essentially eliminating self-absorption. Because of their rare combination of concentrations above 100 mg/mL and high quantum yields, along with minimal self-absorption for good spatial resolution, Mn2+:CsPb(BrCl)3 NCs have the potential to displace ZnS:Cu as the leading scintillator for fast neutron imaging.
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Affiliation(s)
- Federico Montanarella
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Kyle M. McCall
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Kostiantyn Sakhatskyi
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Sergii Yakunin
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Pavel Trtik
- Laboratory
for Neutron Scattering and Imaging, Paul
Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Caterina Bernasconi
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Ihor Cherniukh
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - David Mannes
- Laboratory
for Neutron Scattering and Imaging, Paul
Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - Maryna I. Bodnarchuk
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Markus Strobl
- Laboratory
for Neutron Scattering and Imaging, Paul
Scherrer Institut, 5232 Villigen PSI, Switzerland
| | | | - Maksym V. Kovalenko
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa −
Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
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28
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Yu J, Zhang H, Xu W, Liu G, Tang Y, Zhao D. Quantized doping of CdS quantum dots with twelve gold atoms. Chem Commun (Camb) 2021; 57:6448-6451. [PMID: 34096940 DOI: 10.1039/d1cc02460d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Through a bottom-up strategy, CdS quantum dots (QDs) doped with 12 gold atoms in each nanocrystal (NC) were prepared by cation exchange reactions. The (Au12) dopants inside the CdS matrix were directly observed using Cs-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images and quantitatively confirmed using the inductively coupled plasma atomic emission spectroscopy (ICP-AES) data. With a photoluminescence quantum yield (PLQY) of 37.5%, the as-prepared (Au12)@CdS QDs emitted light at 635 nm. Due to the injection of excited electrons from the lowest unoccupied molecular orbital (LUMO) of dopants to the conduction band (CB) of CdS, multiple fine peaks were observed in the photoluminescence excitation (PLE) spectra. By using clusters as starting materials, we demonstrate a universal approach for the precise tailoring of dopants and provide a pathway for band energy engineering of doped QDs.
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Affiliation(s)
- Junlai Yu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
| | - Hui Zhang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
| | - Wenhao Xu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
| | - Guangnan Liu
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
| | - Yun Tang
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
| | - Dongyuan Zhao
- Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
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29
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Zhang Y, Zhang H, Chen D, Sun CJ, Ren Y, Jiang J, Wang L, Li Z, Peng X. Engineering of Exciton Spatial Distribution in CdS Nanoplatelets. NANO LETTERS 2021; 21:5201-5208. [PMID: 34114464 DOI: 10.1021/acs.nanolett.1c01278] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Zinc-blende CdS nanoplatelets with atomically flat and very large {100} basal planes terminated solely by one type of element (either Cd or S atoms) are synthesized. Optical spectroscopy, X-ray diffraction, X-ray absorption, and transmission electron microscopy confirm that the surface structures of newly developed S-terminated CdS nanoplatelets are at least as well-defined as the original Cd-terminated nanoplatelets. Band gaps of the nanoplatelets are found to depend on not only the quantum-confined dimension (thickness) but also the nature of the surface termination. The facet structure dictates the packing of the ligands (carboxylate for Cd-terminated nanoplatelets and alkyl for S-terminated nanoplatelets), which causes a difference in the lattice strain and significantly affects the optical spectral width. Experimental and theoretical results reveal that engineering the exciton spatial distribution by the tailored synthesis of semiconductor nanocrystals with a precisely controlled surface structure is fully possible, which should open a new door for delivering the long-promised potential of semiconductor nanocrystals.
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Affiliation(s)
- Yan Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Haibing Zhang
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Dongdong Chen
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Cheng-Jun Sun
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Yang Ren
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Jianhui Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Linjun Wang
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zheng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Xiaogang Peng
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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30
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Li ZZ, Wu MX, Ding SN. Anodic near-infrared electrochemiluminescence from Cu-doped CdTe quantum dots for tetracycline detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:2297-2304. [PMID: 33949454 DOI: 10.1039/d1ay00428j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A sensitive anodic near-infrared electrochemiluminescence (ECL) immunosensor for the detection of tetracycline, based on Cu-doped CdTe quantum dots, was fabricated for the first time in this work. We have synthesized Cu-doped CdTe quantum dots by co-precipitation. The emission spectrum of the Cu-doped CdTe quantum dots could reach the near-infrared region at 730 nm in a short reflux time. More importantly, the ECL intensity of the CdTe quantum dots was enhanced by 2 fold after Cu element doping, which was attributed to the Cu d-orbital mixed with the conduction band and valence band of the host CdTe quantum dots. Inspired by the strong anodic ECL intensity of Cu-doped CdTe quantum dots, the anodic near infrared ECL sensor was constructed to detect tetracycline by competitive immunoassay. The detection range of the developed biosensor was 0.01-10 ng mL-1 and the detection limit was 0.0030 ng mL-1. In addition, the biosensor showed outstanding selectivity, long-term stability and high reproducibility, which has great potential in the field of analysis and detection.
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Affiliation(s)
- Zhen-Zhen Li
- Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
| | - Mei-Xia Wu
- Lianshui People's Hospital, Jiangsu 223400, China
| | - Shou-Nian Ding
- Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
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31
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Shi Y, Lim SJ, Ma L, Duan N, Yan X, Tang X, Yang W, Yang S, Hu J, Smith AM, Zhu X. Inorganic-Ligand Quantum Dots Meet Inorganic-Ligand Semiconductor Nanoplatelets: A Promising Fusion to Construct All-Inorganic Assembly. Inorg Chem 2021; 60:6994-6998. [PMID: 33929182 DOI: 10.1021/acs.inorgchem.1c00880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By the reaction of inorganic-ligand CdS/Cd2+ quantum dots (QDs) with inorganic-ligand CdSe/CdS/S2- nanoplatelets (NPLs), semiconductor CdS QDs were fused with CdSe/CdS NPLs to yield all-inorganic assemblies, accompanied by great photoluminescence-enhancement. These all-inorganic assemblies facilitate charge transport between each other and open up interesting prospects with electronic and optoelectronic nanodevices.
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Affiliation(s)
- Yunfeng Shi
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China.,Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Sung Jun Lim
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Liang Ma
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ning Duan
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Xin Yan
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Xiaole Tang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Wenyan Yang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Shu Yang
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Jiaxin Hu
- School of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, People's Republic of China.,Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455000, People's Republic of China
| | - Andrew M Smith
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
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32
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Gil HM, Price TW, Chelani K, Bouillard JSG, Calaminus SD, Stasiuk GJ. NIR-quantum dots in biomedical imaging and their future. iScience 2021; 24:102189. [PMID: 33718839 PMCID: PMC7921844 DOI: 10.1016/j.isci.2021.102189] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Fluorescence imaging has gathered interest over the recent years for its real-time response and high sensitivity. Developing probes for this modality has proven to be a challenge. Quantum dots (QDs) are colloidal nanoparticles that possess unique optical and electronic properties due to quantum confinement effects, whose excellent optical properties make them ideal for fluorescence imaging of biological systems. By selectively controlling the synthetic methodologies it is possible to obtain QDs that emit in the first (650-950 nm) and second (1000-1400 nm) near infra-red (NIR) windows, allowing for superior imaging properties. Despite the excellent optical properties and biocompatibility shown by some NIR QDs, there are still some challenges to overcome to enable there use in clinical applications. In this review, we discuss the latest advances in the application of NIR QDs in preclinical settings, together with the synthetic approaches and material developments that make NIR QDs promising for future biomedical applications.
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Affiliation(s)
- Hélio M. Gil
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor Lambeth Wing, St Thomas' Hospital, London SE1 7EH, London, UK
- Department of Biomedical Sciences, Faculty of Health Sciences, University of Hull, Cottingham Road, HU6 7RX Hull, UK
| | - Thomas W. Price
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor Lambeth Wing, St Thomas' Hospital, London SE1 7EH, London, UK
| | - Kanik Chelani
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor Lambeth Wing, St Thomas' Hospital, London SE1 7EH, London, UK
| | | | - Simon D.J. Calaminus
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, Faculty of Health Sciences, University of Hull, Cottingham Road, HU6 7RX, Hull, UK
| | - Graeme J. Stasiuk
- Department of Imaging Chemistry and Biology, School of Biomedical Engineering and Imaging Sciences, King's College London, 4th Floor Lambeth Wing, St Thomas' Hospital, London SE1 7EH, London, UK
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33
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Kumbhakar P, Roy Karmakar A, Das GP, Chakraborty J, Tiwary CS, Kumbhakar P. Reversible temperature-dependent photoluminescence in semiconductor quantum dots for the development of a smartphone-based optical thermometer. NANOSCALE 2021; 13:2946-2954. [PMID: 33503086 DOI: 10.1039/d0nr07874c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Photoluminescence (PL) intensity-based non-contact optical temperature sensors are in great demand due to their non-contact nature, rapid response, sensitivity, as well as thermal and chemical stability at different environmental conditions. However, herein, reversible temperature dependent PL emission quenching properties of chemically synthesized Mn2+-doped ZnS QDs (MZQDs) have been advantageously utilized for achieving the development of a smartphone-based optical thermometer. The temperature dependent variations of PL have been studied by taking MZQDs in various forms, such as in aqueous dispersion, powder form, and a polymer-encapsulated thin film. The origin of the PL quenching of MZQD in the polymer film has been cross-verified through temperature-dependent electrical conductivity measurement and the movement of charge carriers has also been confirmed by the first-principles DFT simulation. Through thermal cycling experiments on QD-encapsulated polymer film and by utilizing an indigenously-developed Android App based on color coordinates, a novel smartphone-based colorimetric imaging method for the measurement of temperature has been demonstrated in this work. The synthesized smart QDs might be suitable candidates for temperature sensing and the colorimetric thermometer probe may be utilized in various photonics applications as a smart optical sensor for daily life applications.
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Affiliation(s)
- Partha Kumbhakar
- Nanoscience Laboratory, Department of Physics, National Institute of Technology Durgapur, 713209, India.
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34
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Sevim Ünlütürk S, Akdoğan Y, Özçelik S. Mn 2+ ions incorporated into ZnS x Se 1-x colloidal quantum dots: controlling size and composition of nanoalloys and regulating magnetic dipolar interactions. NANOTECHNOLOGY 2021; 32:165701. [PMID: 33533335 DOI: 10.1088/1361-6528/abdb65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A facile synthesis method is introduced how to prepare magnetically active ultraviolet emitting manganese ions incorporated into ZnS x Se1-x colloidal quantum dot (nanoalloy) at 110 °C in aqueous solutions. The reaction time is the main factor to control the hydrodynamic size from 3 to 10 nm and the precursor ratio is significant to tune the alloy composition. ZnS shell layer on the ZnS x Se1-x core was grown to passivate environmental effects. The nanoalloy has ultraviolet emission at 380 nm having a lifetime of 80 ns and 7% quantum yield. The incorporation of Mn2+ ions into the nanoalloys induced magnetic activity but did not modify the structure and photophysical properties of the nanoalloys. Colloidal and powdery samples were prepared and analyzed by electron paramagnetic resonance (EPR) spectroscopy. In the colloidal dispersions, EPR spectra showed hyperfine line splitting regardless of the Mn2+ ion fractions, up to 6%, indicating that Mn2+ ions incorporated into the nanoalloys were isolated. EPR signals of the powdery samples were broadened when the fraction of Mn2+ ions was higher than 0.1%. The EPR spectra were simulated to reveal the locations and interactions of Mn2+ ions. The simulations suggest that the Mn2+ ions are located on the nanoalloy surfaces. These findings infer that the magnetic dipolar interactions are regulated by the initial mole ratio of Mn/Zn and the physical state of the nanoalloys adjusted by preparation methods.
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Affiliation(s)
- Seçil Sevim Ünlütürk
- Department of Chemistry, İzmir Institute of Technology, 35430 Gülbahçe, Urla, İzmir, Turkey
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35
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Preparation and properties of Ag plasmonic structures on garnet substrates. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-020-01624-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Zhang S, Si Y, Li B, Yang L, Dai W, Luo S. Atomic-Level and Modulated Interfaces of Photocatalyst Heterostructure Constructed by External Defect-Induced Strategy: A Critical Review. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2004980. [PMID: 33289948 DOI: 10.1002/smll.202004980] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/26/2020] [Indexed: 06/12/2023]
Abstract
Despite the existence of numerous photocatalyst heterostructures, their separation efficiency and charge flow precision remain low due to the poor study on interfacial properties. The photocatalysts with confined defects can effectively control the photogenerated carrier migration, but the metastability of such defects considerably decreases the photocatalyst stability. Meanwhile, the introduction of defective region can increase the coordinative unsaturation and delocalize local electrons to promote their interactions with the molecules/ions in that region. The selective growth of modulated heterogeneous interface by defect-induced strategy may not only increase the stability of defective structures, but also enhance the migration of interfacial charges. Using this method, photocatalytic heterostructures with low contact resistances and intimate interfaces are constructed to achieve the optimal charge migration in terms of efficiency and accuracy. In this work, the point, linear, and planar heterogeneous interfaces and related defect engineering techniques are discussed. Particularly, it is focused on the external, defect-induced interfacial heterogeneities with various spatial and dimensional configurations, which exhibit modulated and controllable interfacial properties. Furthermore, the main aspects of fabricating photocatalyst heterostructures by the defect-induced strategy, including the i) controllable generation of defects, ii) advanced characterization methods, and iii) elaborate construction of the minimal interface, are described.
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Affiliation(s)
- Shuqu Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Yanmei Si
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Bing Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Lixia Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Weili Dai
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
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37
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Kagan CR, Bassett LC, Murray CB, Thompson SM. Colloidal Quantum Dots as Platforms for Quantum Information Science. Chem Rev 2020; 121:3186-3233. [DOI: 10.1021/acs.chemrev.0c00831] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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38
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Marin R, Jaque D. Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence. Chem Rev 2020; 121:1425-1462. [DOI: 10.1021/acs.chemrev.0c00692] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Riccardo Marin
- Fluorescence Imaging Group (FIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid 28049, Spain
| | - Daniel Jaque
- Fluorescence Imaging Group (FIG), Departamento de Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, Madrid 28049, Spain
- Nanobiology Group, Instituto Ramón y Cajal de Investigación, Sanitaria Hospital Ramón y Cajal, Ctra. De Colmenar Viejo, Km. 9100, 28034 Madrid, Spain
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39
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Zhang Z, Zhao R, Teng S, Huang K, Zhang L, Wang D, Yang W, Xie R, Pradhan N. Color Tunable Self-Trapped Emissions from Lead-Free All Inorganic IA-IB Bimetallic Halides Cs-Ag-X (X = Cl, Br, I). SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2004272. [PMID: 33025738 DOI: 10.1002/smll.202004272] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/26/2020] [Indexed: 06/11/2023]
Abstract
Multi-metallic halides of group IA and IB metals are emerged as a new class of color tunable emitters. While chalcogenides and perovskites are extensively studied, these families of materials are little explored. In comparison, herein, lead and cadmium free bimetallic Cs-Ag-X (X = Cl, Br, I) halides are reported where the larger ion Ag+ helped in incorporating all the halide ions which in turn tune their emission color in spanning from 397 nm (violet) to 820 nm (near infrared) as a function of their composition. The synthesis method adopted here is the solvent free ball milling of respective halides of Cs and Ag and took the record shortest time and in bulk scale. From decay lifetimes, emissions from these bimetallic halides are found as a result of fast recombination of self-trapped excitons, which exhibited not only reasonably high quantum yield in the range of 17-68% but also excellent stability to air and moisture under ambient conditions. These also show wide Stokes shift with relatively longer decay lifetimes ranging above the exciton and below the surface trap or dopant induced emissions of inorganic semiconductors, indicating a new class of materials having unique identity of their optical behaviors.
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Affiliation(s)
- Zixu Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Ruoting Zhao
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Shiyong Teng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Lijun Zhang
- State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Automobile Materials of MOE, and College of Materials Science and Engineering, Jilin University, Changchun, 130012, China
| | - Dayang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Wensheng Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Renguo Xie
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata, West Bengal, 700032, India
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40
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Zhang J, Bu X, Feng P, Wu T. Metal Chalcogenide Supertetrahedral Clusters: Synthetic Control over Assembly, Dispersibility, and Their Functional Applications. Acc Chem Res 2020; 53:2261-2272. [PMID: 32877164 DOI: 10.1021/acs.accounts.0c00381] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
ConspectusMetal chalcogenide supertetrahedral clusters (MCSCs) bear the closest structural resemblance to II-VI or I-III-VI semiconductor nanocrystals and can be considered as well-defined ultrasmall "quantum dots" (QDs). Compared to traditional colloidal QDs that are typically associated with size dispersity, irregular surface atomic structures, poorly defined core-ligand interfaces, and random defect/dopant sites, the nano- or subnano-sized MCSCs feature precise structural properties such as atomically uniform size, precise structure, and ordered dopant distribution, all of which offer ample opportunities for a broad and in-depth understanding of the correlation between the precise local structure and site- or size-dependent properties, which are critical to the exploitation of their functional applications. Our previous Account in 2005 provided a narrative on the efforts to expand the structural diversity of open-framework materials using different-sized and compositionally tunable clusters as building blocks with a primary objective of integrating the semiconducting properties with porosity in zeolite-type solids. Over the past 15 years, significant progress has been made, particularly in the synthetic control of discrete clusters, allowing the establishment of the composition-structure-property correlation of the MCSCs to guide the optimization of their properties for various applications. In the present Account, the recent progress in MCSC-based chemistry is reviewed from three aspects: (1) controllable synthesis of new members and types of MCSC models and the development of organic-ligand-directed hybrid assembly modes for MCSC-based open frameworks; (2) new synthetic strategies for the discretization of MCSCs in crystal lattice and their dispersibility in solvents, affording practical applications of pure inorganic MCSCs as nanomaterials; and (3) functionality of MCSC-based materials including photochemical and electrochemical properties triggered by precise dopant/defect sites, open-framework-related functional expansion via host-guest chemistry, and dispersed cluster-based composite materials with synergy from functional multimetallic components. All these advances show that MCSCs with well-defined structures and atomically precise dopant/defect sites are powerful model systems for establishing the precise structure-composition-property correlation and understanding the photophysical dynamic behaviors, both of which are difficult or impossible to achieve in the traditional QD system. Perspectives on their potential applications are presented in terms of the amorphous assemblies of monodispersed MCSCs, MCSC-based two-dimensional layered materials, and optical/electronic devices.
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Affiliation(s)
- Jiaxu Zhang
- College of Chemistry, Chemical Engineering and Material Sciences, Soochow University, Suzhou, Jiangsu 215123, China
| | - Xianhui Bu
- Department of Chemistry and Biochemistry, California State University, Long Beach, California 90840, United States
| | - Pingyun Feng
- Department of Chemistry, University of California, Riverside, California 92521, United States
| | - Tao Wu
- College of Chemistry, Chemical Engineering and Material Sciences, Soochow University, Suzhou, Jiangsu 215123, China
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41
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Han B, Gao X, Lv J, Tang Z. Magnetic Circular Dichroism in Nanomaterials: New Opportunity in Understanding and Modulation of Excitonic and Plasmonic Resonances. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1801491. [PMID: 30345582 DOI: 10.1002/adma.201801491] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 08/16/2018] [Indexed: 06/08/2023]
Abstract
The unique capability of magnetic circular dichroism (MCD) in revealing geometry and electronic information has provided new opportunities in exploring the relationship between structure and magneto-optical properties in nanomaterials with extraordinary optical absorption. Here, the representative studies referring to application of the MCD technique in semiconductor and noble metal nanomaterials are overviewed. MCD is powerful in elucidating the structural information of the excitonic transition in semiconductor nanocrystals, electronic transitions in noble metal nanoclusters, and plasmon resonance in noble metal nanostructures. By virtue of these advantages, the MCD technique shows its unrivalled ability in evaluating the magnetic modulation of excitonic and plasmonic optical activity of nanomaterials with varied chemical composition, geometry, assembly conformation, and coupling effect. Knowledge of the key factors in manipulating magneto-optical properties at the nanoscale acquired with the MCD technique will largely boost the application of semiconductor and noble nanomaterials in the fields of sensing, spintronic, nanophotonics, etc.
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Affiliation(s)
- Bing Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiaoqing Gao
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Jiawei Lv
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
| | - Zhiyong Tang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, P. R. China
- School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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42
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Shan B, Wang H, Li L, Zhou G, Wen Y, Chen M, Li M. Rationally designed dual-plasmonic gold nanorod@cuprous selenide hybrid heterostructures by regioselective overgrowth for in vivo photothermal tumor ablation in the second near-infrared biowindow. Am J Cancer Res 2020; 10:11656-11672. [PMID: 33052239 PMCID: PMC7546011 DOI: 10.7150/thno.51287] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022] Open
Abstract
NIR-II plasmonic materials offer multiple functionalities for in vivo biomedical applications, such as photothermal tumor ablation, surface-enhanced Raman scattering biosensing, photoacoustic imaging, and drug carriers. However, integration of noble metals and plasmonic semiconductors is greatly challenging because of the large lattice-mismatch. This study reports the regioselective overgrowth of Cu2-xSe on gold nanorods (GNRs) for preparation of dual-plasmonic GNR@Cu2-xSe hybrid heterostructures with tunable NIR-II plasmon resonance absorption for in vivo photothermal tumor ablation. Methods: The regioselective deposition of amorphous Se and its subsequent conversion into Cu2-xSe on the GNRs are performed by altering capping agents to produce the GNR@Cu2-xSe heterostructures of various morphologies. Their photothermal performances for NIR-II photothermal tumor ablation are evaluated both in vitro and in vivo. Results: We find that the lateral one- and two-side deposition, conformal core-shell coating and island growth of Cu2-xSe on the GNRs can be achieved using different capping agents. The Cu2-xSe domain size in these hybrids can be effectively adjusted by the SeO2 concentration, thereby tuning the NIR-II plasmon bands. A photothermal conversion efficiency up to 58-85% and superior photostability of these dual-plasmonic hybrids can be achieved under the NIR-II laser. Results also show that the photothermal conversion efficiency is dependent on the proportion of optical absorption converted into heat; however, the temperature rise is tightly related to the concentration of their constituents. The excellent NIR-II photothermal effect is further verified in the following in vitro and in vivo experiments. Conclusions: This study achieves one-side or two-side deposition, conformal core-shell coating, and island deposition of Cu2-xSe on GNRs for GNR@Cu2-xSe heterostructures with NIR-II plasmonic absorption, and further demonstrates their excellent NIR-II photothermal tumor ablation in vivo. This study provides a promising strategy for the rational design of NIR-II dual-plasmonic heterostructures and highlights their therapeutic in vivo potential.
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43
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Zhang H, Yu J, Sun C, Xu W, Chen J, Sun H, Zong C, Liu Z, Tang Y, Zhao D. An Aqueous Route Synthesis of Transition-Metal-Ions-Doped Quantum Dots by Bimetallic Cluster Building Blocks. J Am Chem Soc 2020; 142:16177-16181. [DOI: 10.1021/jacs.0c07274] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hui Zhang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Junlai Yu
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Caixia Sun
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Wenhao Xu
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Jie Chen
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Hui Sun
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Chen Zong
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Zhen Liu
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Yun Tang
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
| | - Dongyuan Zhao
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200438, China
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44
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Lei L, Huang D, Cheng M, Deng R, Chen S, Chen Y, Wang W. Defects engineering of bimetallic Ni-based catalysts for electrochemical energy conversion. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213372] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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45
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Ding H, Zhu Y, Wang Y, Jiang H, Wang X. In Situ Green Synthesis of Ni‐Doped CsPbBr
3
@SiO
2
Composites with Superior Stability for Fabrication of White Light‐Emitting Diodes. ChemistrySelect 2020. [DOI: 10.1002/slct.202002623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hongwei Ding
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
- School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 China
| | - Yizhi Zhu
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
| | - Yihan Wang
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
| | - Hui Jiang
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
| | - Xuemei Wang
- State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096 China
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46
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Hofman E, Khammang A, Wright JT, Li ZJ, McLaughlin PF, Davis AH, Franck JM, Chakraborty A, Meulenberg RW, Zheng W. Decoupling and Coupling of the Host-Dopant Interaction by Manipulating Dopant Movement in Core/Shell Quantum Dots. J Phys Chem Lett 2020; 11:5992-5999. [PMID: 32633980 DOI: 10.1021/acs.jpclett.0c01861] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Doping through the incorporation of transition metal ions allows for the emergence of new optical, electrical, and magnetic properties in quantum dots (QDs). While dopants can be introduced into QDs through many synthetic methods, the control of dopant location and host-dopant (H-D) coupling through directional dopant movement is still largely unexplored. In this work, we have studied dopant behaviors in Mn:CdS/ZnS core/shell QDs and found that dopant transport behavior is very sensitive to the temperature and microenvironments within the QDs. The migration of Mn toward the alloyed interface of the core/shell QDs, below a temperature boundary (Tb) at ∼200 °C, weakens the H-D interactions. At temperatures higher than the Tb, however, dopant ejection and global alloying of CdS/ZnS QDs can occur, leading to stronger H-D coupling. The behavior of incorporated dopants inside QDs is fundamentally important for understanding doping mechanisms and the host-dopant interaction-dependent properties of doped nanomaterials.
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Affiliation(s)
- Elan Hofman
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Alex Khammang
- Department of Physics and Astronomy and Frontier Institute for Research in Sensor Technologies, University of Maine, Orono, Maine 04469, United States
| | - Joshua T Wright
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616, United States
| | - Zhi-Jun Li
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | | | - Andrew Hunter Davis
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - John Mark Franck
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Arindam Chakraborty
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Robert W Meulenberg
- Department of Physics and Astronomy and Frontier Institute for Research in Sensor Technologies, University of Maine, Orono, Maine 04469, United States
| | - Weiwei Zheng
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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47
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Li P, Zhu L, Ma C, Zhang L, Guo L, Liu Y, Ma H, Zhao B. Plasmonic Molybdenum Tungsten Oxide Hybrid with Surface-Enhanced Raman Scattering Comparable to that of Noble Metals. ACS APPLIED MATERIALS & INTERFACES 2020; 12:19153-19160. [PMID: 32233413 DOI: 10.1021/acsami.0c00220] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The surface-enhanced Raman scattering (SERS) research is in full swing owing to its high sensitivity and high selectivity; however, the substrates with superexcellent performance for SERS are largely confined to noble metals (Au, Ag, etc.). Although the SERS active substrates have been extended to semiconductors and transition metals, it is frustrating that their sensitivities are insufficient for widespread practical application. Here, we report the plasmonic molybdenum tungsten oxide (MWO) hybrid nanomaterials (NMs), which can be used as high-performance substrates with SERS comparable to that of noble metals. MWO NMs can achieve the trace detection of rhodamine 6G (R6G), basic fuchsin (BF), and oil red O (ORO). The detection limit concentration for R6G is 10-8 M, with the maximum enhancement factor of up to 6.09 × 107. The superexcellent SERS performance was attributed to the cooperative enhancement effect of electromagnetic (EM) enhancement mechanism and the charge transfer (CT) mechanism. Moreover, in the proposed system, the EM and CT contribution was distinguished by employing poly(vinylpyrrolidone) (PVP), which serves as a barrier layer to prevent the CT process from MWO NMs to R6G. These remarkable MWO NMs can be obtained with a facile method, and this research provides new insight into non-noble metal based SERS substrate.
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Affiliation(s)
- Peng Li
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Lin Zhu
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Chao Ma
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
- Institute of Theoretical Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130023, China
| | - Lixia Zhang
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
- Institute of Theoretical Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130023, China
| | - Lin Guo
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Yawen Liu
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Hao Ma
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | - Bing Zhao
- Stake Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, China
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48
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Han P, Zhang X, Luo C, Zhou W, Yang S, Zhao J, Deng W, Han K. Manganese-Doped, Lead-Free Double Perovskite Nanocrystals for Bright Orange-Red Emission. ACS CENTRAL SCIENCE 2020; 6:566-572. [PMID: 32342006 PMCID: PMC7181313 DOI: 10.1021/acscentsci.0c00056] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Indexed: 05/19/2023]
Abstract
Lead-free halide perovskite nanocrystals (NCs) have recently attracted attention due to their nontoxicity and stability as alternatives to lead-based perovskite NCs. Here, we report undoped and manganese-doped all-inorganic, lead-free double perovskite (DP) NCs: Cs2NaIn x Bi1-x Cl6 (0 < x < 1) and Cs2NaIn x Bi1-x Cl6:Mn (0 ≤ x ≤ 1) NCs. Undoped NCs exhibit blue emission. Through doping Mn2+ ions into Cs2NaIn x Bi1-x Cl6 NCs, we can avoid self-trapped exciton emission and realize bright orange red emission of Mn2+ dopants with the highest photoluminescence quantum efficiency of 44.6%. The photoluminescence (PL) is tunable from yellow emission to orange-red emission corresponding to a red shift from 583 to 614 nm with increasing In content. Interestingly, the PL emission of Mn-doped NCs shows a red shift from the bulk size to the nanoscale. The Mn-doped NCs show good stability in air. In addition, we further prove the process of dark self-trapped state-assisted Mn2+ emission in DP NCs by ultrafast transient absorption techniques.
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Affiliation(s)
- Peigeng Han
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
- University
of the Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Xue Zhang
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Cheng Luo
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
- University
of the Chinese Academy of Sciences, Beijing 100049, P. R.
China
| | - Wei Zhou
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
| | - Songqiu Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
| | - Jianzhang Zhao
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Weiqiao Deng
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
- Institute
of Molecular Sciences and Engineering, Shandong
University, Qingdao 266237, P. R. China
| | - Keli Han
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, P. R. China
- Institute
of Molecular Sciences and Engineering, Shandong
University, Qingdao 266237, P. R. China
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49
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Mizuno H, Kitamatsu M, Imai Y, Fukuhara G. Smart Fluorescence Materials that Are Controllable by Hydrostatic Pressure: Peptide−Pyrene Conjugates. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hiroaki Mizuno
- Department of ChemistryTokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8551 Japan
| | - Mizuki Kitamatsu
- Department of Applied ChemistryFaculty of Science and EngineeringKindai University 3-4-1 Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Yoshitane Imai
- Department of Applied ChemistryFaculty of Science and EngineeringKindai University 3-4-1 Kowakae Higashi-Osaka Osaka 577-8502 Japan
| | - Gaku Fukuhara
- Department of ChemistryTokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku Tokyo 152-8551 Japan
- JST, PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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50
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Structural and Optical Characteristics of Highly UV-Blue Luminescent ZnNiO Nanoparticles Prepared by Sol-Gel Method. MATERIALS 2020; 13:ma13040879. [PMID: 32075345 PMCID: PMC7079612 DOI: 10.3390/ma13040879] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/05/2020] [Accepted: 02/09/2020] [Indexed: 11/17/2022]
Abstract
A simple single pot sol-gel method is used to prepare ZnNiO nanoparticles at assorted Ni doping levels, 1, 3, 7 and 10 wt.%. Structural and optical properties of nanoparticles are studied by X-ray diffraction (XRD), UV-visible diffuse reflection spectroscopy (DRS), photoluminescence (PL) measurements, scanning electron microscopy (SEM), μ-Raman and X-ray photoelectron-spectroscopy (XPS). A single substitutional solid solution phase is detected in the wurtzite ZnNiO nanoparticles at various doping levels. XRD peak splitting and shifting is ascribed to reduced wurtzite character and presence of crystalline strain in nanoparticles at higher level of Ni doping. The Kubelka-Munk function of DRS data reveals the presence of the Burstein-Moss effect in the optical absorption of ZnNiO nanoparticles. Photoluminescence studies show intense UV-blue emission from ZnNiO nanoparticles. The UV PL also exhibits the Burstein-Moss blue shift in the ZnNiO luminescence. Raman analyses also confirms the wurtzite structure of ZnNiO nanoparticles; however, crystal structural defects and bond stiffness increase with Ni doping. The optical and structural studies presented in this work are pointing towards a multivalent Ni substitution in the nanoparticles.
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