1
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Ipinza-Concha BM, Dibona-Villanueva L, Fuentealba D, Pinilla-Quispe A, Schwantes D, Garzón-Nivia MA, Herrera-Défaz MA, Valdés-Gómez HA. Effect of Chitosan-Riboflavin Bioconjugate on Green Mold Caused by Penicillium digitatum in Lemon Fruit. Polymers (Basel) 2024; 16:884. [PMID: 38611142 PMCID: PMC11013941 DOI: 10.3390/polym16070884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 04/14/2024] Open
Abstract
Penicillium digitatum is the causal agent of green mold, a primary postharvest disease of citrus fruits. This study evaluated the efficacy of a novel photoactive chitosan-riboflavin bioconjugate (CH-RF) to control green mold in vitro and in lemon fruit. The results showed total inhibition of P. digitatum growth on APDA supplemented with CH-RF at 0.5% (w/v) and a significant reduction of 84.8% at 0.25% (w/v). Lemons treated with CH-RF and kept under controlled conditions (20 °C and 90-95% relative humidity) exhibited a noteworthy reduction in green mold incidence four days post-inoculation. Notably, these effects persisted, with all treatments remaining significantly distinct from the control group until day 14. Furthermore, CH-RF showed high control of green mold in lemons after 20 days of cold storage (5 ± 1 °C). The disease incidence five days after cold storage indicated significant differences from the values observed in the control. Most CH-RF treatments showed enhanced control of green mold when riboflavin was activated by white-light exposure. These findings suggest that this novel fungicide could be a viable alternative to conventional synthetic fungicides, allowing more sustainable management of lemon fruit diseases.
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Affiliation(s)
- Brenda M. Ipinza-Concha
- Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; (B.M.I.-C.)
| | - Luciano Dibona-Villanueva
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Denis Fuentealba
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Alexander Pinilla-Quispe
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Daniel Schwantes
- Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; (B.M.I.-C.)
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - María A. Garzón-Nivia
- Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; (B.M.I.-C.)
| | - Mario A. Herrera-Défaz
- Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; (B.M.I.-C.)
| | - Héctor A. Valdés-Gómez
- Facultad de Agronomía y Sistemas Naturales, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile; (B.M.I.-C.)
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2
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MacLachlan R, Kanji F, Sakib S, Khan S, Pattyn C, M Imani S, Didar TF, Soleymani L. Superomniphobic and Photoactive Surface Presents Antimicrobial Properties by Repelling and Killing Pathogens. ACS Appl Mater Interfaces 2023; 15:55287-55296. [PMID: 37976404 DOI: 10.1021/acsami.3c11074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Healthcare-acquired infections place a significant burden on the cost and quality of patient care in hospitals. Reducing contamination on surfaces within healthcare environments is critical for halting the spread of these infections. Herein, we report a bifunctional─repel and kill─surface developed using photoactive TiO2 nanoparticles integrated into a hierarchical scaffold (OmniKill). To quantify the repellency of OmniKill, we developed a touch-based assay, capable of simulating the transfer of individual pathogens, multiple pathogens, or pathogen-latent fecal matter from hands to surfaces. OmniKill repels bacterial pathogens by at least 2.77-log (99.8%). The photoactive material within OmniKill further reduces the viability of transferred pathogens on the surface by an additional 2.43-log (99.6%) after 1 h of light exposure. The antipathogenic effects─repel and kill─remain robust under complex biological contaminates such as feces. These findings show the potential use of OmniKill in reducing the physical transmission of bacterial pathogens in healthcare settings.
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Affiliation(s)
- Roderick MacLachlan
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Farhaan Kanji
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Sadman Sakib
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Shadman Khan
- School of Biomedical Engineering, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Cedric Pattyn
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Sara M Imani
- School of Biomedical Engineering, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Tohid F Didar
- School of Biomedical Engineering, McMaster University, Hamilton L8S 4L7, Ontario, Canada
- Department of Mechanical Engineering, McMaster University, Hamilton L8S 4L7, Ontario, Canada
| | - Leyla Soleymani
- Department of Engineering Physics, McMaster University, Hamilton L8S 4L7, Ontario, Canada
- School of Biomedical Engineering, McMaster University, Hamilton L8S 4L7, Ontario, Canada
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3
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Mitchell TB, Zhang X, Jerozal RT, Chen YS, Wang S, Benedict JB. Development of a scalar-based geometric parameterization approach for the crystal structure landscape of dithienylethene-based crystalline solids. IUCrJ 2023; 10:694-699. [PMID: 37750828 PMCID: PMC10619447 DOI: 10.1107/s2052252523008060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 09/14/2023] [Indexed: 09/27/2023]
Abstract
Dithienylethenes (DTEs) are a promising class of organic photoswitches that can be used to create crystalline solids with properties controlled by light. However, the ability of DTEs to adopt multiple conformations, only one of which is photoactive, complicates the rational design of these materials. Herein, the synthesis and structural characterization of 19 crystalline solids containing a single DTE molecule are described. A novel D-D analysis of the molecular geometries obtained from rotational potential energy surface calculations and the ensemble of experimental structures were used to construct a crystal landscape for DTE. Of the 19 crystal structures, 17 contained photoinactive DTE rotamers and only 2 were photoactive. These results highlight the challenges associated with the design of these materials. Overall, the D-D analysis described herein provides rapid, effective and intuitive means of linking the molecular structure to photoactivity that could be applied more broadly to afford a general strategy for producing photoactive diarylethene-based crystalline solids.
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Affiliation(s)
- Travis B. Mitchell
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Xiaotong Zhang
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Ronald T. Jerozal
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
| | - Yu-Sheng Chen
- NSF’s ChemMatCARS, University of Chicago, Chicago, Lemont, IL 60439, USA
| | - SuYin Wang
- NSF’s ChemMatCARS, University of Chicago, Chicago, Lemont, IL 60439, USA
| | - Jason B. Benedict
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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4
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Fatehmulla A, Shamsan BA, El-Naggar AM, Aldhafiri AM, Qureshi N, Kim T, Atif M, Mahmood A, Asif M. Physical Characteristics, Blue-Green Band Emission and Photocatalytic Activity of Au-Decorated ZnO Quantum Dots-Based Thick Films Prepared Using the Doctor Blade Technique. Molecules 2023; 28:4644. [PMID: 37375199 DOI: 10.3390/molecules28124644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 05/29/2023] [Accepted: 06/02/2023] [Indexed: 06/29/2023] Open
Abstract
Nanoscale ZnO is a vital semiconductor material whose versatility can be enhanced by sensitizing it with metals, especially noble metals, such as gold (Au). ZnO quantum dots were prepared via a simple co-precipitation technique using 2-methoxy ethanol as the solvent and KOH as the pH regulator for hydrolysis. The synthesized ZnO quantum dots were deposited onto glass slides using a simple doctor blade technique. Subsequently, the films were decorated with gold nanoparticles of different sizes using a drop-casting method. The resultant films were characterized via various strategies to obtain structural, optical, morphological, and particle size information. The X-ray diffraction (XRD) reveals the formation of the hexagonal crystal structure of ZnO. Upon Au nanoparticles loading, peaks due to gold are also observed. The optical properties study shows a slight change in the band gap due to Au loading. Nanoscale sizes of particles have been confirmed through electron microscope studies. P.L. studies display blue and blue-green band emissions. The significant degradation efficiency of 90.2% methylene blue (M.B.) was attained in natural pH in 120 min using pure ZnO catalyst while one drop gold-loaded catalysts, ZnO: Au 5 nm, ZnO: Au 7 nm, ZnO: Au 10 nm and ZnO: Au 15 nm, delivered M.B. degradation efficiency of 74.5% (in 245 min), 63.8% (240 min), 49.6% (240 min) and 34.0% (170 min) in natural pH, respectively. Such films can be helpful in conventional catalysis, photocatalysis, gas sensing, biosensing, and photoactive applications.
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Affiliation(s)
- Amanullah Fatehmulla
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Belqes A Shamsan
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed M El-Naggar
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Abdullah M Aldhafiri
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Nilam Qureshi
- Nano Particles Technology Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, Republic of Korea
| | - Taesung Kim
- Nano Particles Technology Laboratory, School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Gyeonggi-do, Republic of Korea
| | - Muhammad Atif
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Asif Mahmood
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
| | - Mohammad Asif
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh 11421, Saudi Arabia
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5
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Feringán B, Martínez-Bueno A, Sierra T, Giménez R. Triphenylamine-Containing Benzoic Acids: Synthesis, Liquid Crystalline and Redox Properties. Molecules 2023; 28:molecules28072887. [PMID: 37049649 PMCID: PMC10096164 DOI: 10.3390/molecules28072887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/16/2023] [Accepted: 03/18/2023] [Indexed: 04/14/2023] Open
Abstract
The synthesis, characterization and liquid crystalline and electrochemical properties of novel triarylamines, in which the triphenylamine platform is non-symmetrically modified with a 4-(6-oxyhexyloxy)benzoic acid group, are reported. Compounds show columnar liquid crystalline behavior, as confirmed through the use of polarized optical microscopy, differential scanning calorimetry and X-ray diffraction. Electrochemical properties were measured using cyclic voltammperometry, obtaining low oxidation potentials and HOMO values that were optimum for consideration as organic semiconductors in hole transport layers. In addition, the photoredox activity of one of these derivatives in dichloromethane was studied under light irradiation. A photooxidation/assembly process under white light irradiation occurs without the assistance of hydrogen bonding amide functional groups.
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Affiliation(s)
- Beatriz Feringán
- Instituto de Nanociencia y Materiales de Aragón (INMA), Departamento de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Alejandro Martínez-Bueno
- Instituto de Nanociencia y Materiales de Aragón (INMA), Departamento de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Teresa Sierra
- Instituto de Nanociencia y Materiales de Aragón (INMA), Departamento de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
| | - Raquel Giménez
- Instituto de Nanociencia y Materiales de Aragón (INMA), Departamento de Química Orgánica, Facultad de Ciencias, CSIC-Universidad de Zaragoza, 50009 Zaragoza, Spain
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6
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Tufts NQ, Chiu NC, Musa EN, Gallagher TC, Fast DB, Stylianou KC. Photoactive Organo-Sulfur Polymers for Hydrogen Generation. Chemistry 2023; 29:e202203177. [PMID: 36683006 DOI: 10.1002/chem.202203177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/16/2023] [Accepted: 01/16/2023] [Indexed: 01/24/2023]
Abstract
Herein, we report the synthesis of photoactive polymeric organo-sulfur (POS) materials. These polymers absorb light in the ultraviolet/visible and near-infrared region of the solar spectrum, and upon irradiation, they reduce water to hydrogen (H2 ). The decoration of POS materials with nitrile (-CN) groups is found to be the critical factor for enhanced interactions with the co-catalyst, Ni2 P, leading to greater H2 evolution rates compared to the nitrile-free POS material.
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Affiliation(s)
- Noah Q Tufts
- Materials Discovery Laboratory (MaD Lab), Oregon State University, Corvallis, Oregon, 97331, United States.,Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Nan Chieh Chiu
- Materials Discovery Laboratory (MaD Lab), Oregon State University, Corvallis, Oregon, 97331, United States.,Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Emmanuel Nyela Musa
- Materials Discovery Laboratory (MaD Lab), Oregon State University, Corvallis, Oregon, 97331, United States.,Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Trenton C Gallagher
- Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Dylan B Fast
- Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
| | - Kyriakos C Stylianou
- Materials Discovery Laboratory (MaD Lab), Oregon State University, Corvallis, Oregon, 97331, United States.,Department of Chemistry, Oregon State University, Corvallis, Oregon, 97331, United States
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7
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Meier CJ, Rouhier MF, Hillyer JF. Chemical Control of Mosquitoes and the Pesticide Treadmill: A Case for Photosensitive Insecticides as Larvicides. Insects 2022; 13:1093. [PMID: 36555003 PMCID: PMC9783766 DOI: 10.3390/insects13121093] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Insecticides reduce the spread of mosquito-borne disease. Over the past century, mosquito control has mostly relied on neurotoxic chemicals-such as pyrethroids, neonicotinoids, chlorinated hydrocarbons, carbamates and organophosphates-that target adults. However, their persistent use has selected for insecticide resistance. This has led to the application of progressively higher amounts of insecticides-known as the pesticide treadmill-and negative consequences for ecosystems. Comparatively less attention has been paid to larvae, even though larval death eliminates a mosquito's potential to transmit disease and reproduce. Larvae have been targeted by source reduction, biological control, growth regulators and neurotoxins, but hurdles remain. Here, we review methods of mosquito control and argue that photoactive molecules that target larvae-called photosensitive insecticides or PSIs-are an environmentally friendly addition to our mosquitocidal arsenal. PSIs are ingested by larvae and produce reactive oxygen species (ROS) when activated by light. ROS then damage macromolecules resulting in larval death. PSIs are degraded by light, eliminating environmental accumulation. Moreover, PSIs only harm small translucent organisms, and their broad mechanism of action that relies on oxidative damage means that resistance is less likely to evolve. Therefore, PSIs are a promising alternative for controlling mosquitoes in an environmentally sustainable manner.
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Affiliation(s)
- Cole J. Meier
- Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA
| | | | - Julián F. Hillyer
- Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235, USA
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8
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Miralles-Comins S, Zanatta M, Sans V. Advanced Formulations Based on Poly(ionic liquid) Materials for Additive Manufacturing. Polymers (Basel) 2022; 14. [PMID: 36501514 DOI: 10.3390/polym14235121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/22/2022] [Accepted: 11/22/2022] [Indexed: 11/26/2022] Open
Abstract
Innovation in materials specially formulated for additive manufacturing is of great interest and can generate new opportunities for designing cost-effective smart materials for next-generation devices and engineering applications. Nevertheless, advanced molecular and nanostructured systems are frequently not possible to integrate into 3D printable materials, thus limiting their technological transferability. In some cases, this challenge can be overcome using polymeric macromolecules of ionic nature, such as polymeric ionic liquids (PILs). Due to their tuneability, wide variety in molecular composition, and macromolecular architecture, they show a remarkable ability to stabilize molecular and nanostructured materials. The technology resulting from 3D-printable PIL-based formulations represents an untapped array of potential applications, including optoelectronic, antimicrobial, catalysis, photoactive, conductive, and redox applications.
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9
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Yi S, Wu J, Zhou Y, Wang X, Pu Y, Ran B. Fabrication of Rechargeable Photoactive Silk Fibroin/Polyvinyl Alcohol Blend Nanofibrous Membranes for Killing Bacteria. Polymers (Basel) 2022; 14:2499. [PMID: 35746075 DOI: 10.3390/polym14122499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 06/17/2022] [Accepted: 06/17/2022] [Indexed: 02/01/2023] Open
Abstract
Antibacterial materials that prevent bacterial infections and mitigate bacterial virulence have attracted great scientific interest. In recent decades, bactericidal polymers have been presented as promising candidates to combat bacterial pathogens. However, the preparation of such materials has proven to be extremely challenging. Herein, photoactive silk fibroin/polyvinyl alcohol blended nanofibrous membranes grafted with 3,3’,4,4’-benzophenone tetracarboxylic dianhydride (G-SF/PVA BNM) were fabricated by an electrospinning technique. The premise of this work is that the G-SF/PVA BNM can store photoactive activity under light irradiation and release reactive oxygen species for killing bacteria under dark conditions. The results showed that the resultant G-SF/PVA BNM exhibited the integrated properties of an ultrathin fiber diameter (298 nm), good mechanical properties, robust photoactive activity and photo-store capacity, and great photoinduced antibacterial activity against E. coli and S. aureus (99.999% bacterial reduction with 120 min). The successful construction of blended nanofibrous membranes gives a new possibility to the design of highly efficient antibacterial materials for public health protection.
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Chen J, Zhou A, Nie Y, Chen K, Zhang Y, Xu Y, Kong D, Shao K, Ning X. Photoactive 3D-Printed Hypertensile Metamaterials for Improving Dynamic Modeling of Stem Cells. Nano Lett 2022; 22:135-144. [PMID: 34967636 DOI: 10.1021/acs.nanolett.1c03472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Current three-dimensional (3D) cell culture systems mainly rely on static cell culture and lack the ability to thoroughly manage cell intrinsic behaviors and biological characteristics, leading to unsatisfied cell activity. Herein, we have developed photoactive 3D-printed hypertensile metamaterials based dynamic cell culture system (MetaFold) for guiding cell fate. MetaFold exhibited high elasticity and photothermal conversion efficiency due to its metapattern architecture and micro/nanoscale polydopamine coating, allowing for responding to mechanical and light stimulation to construct dynamic culture conditions. In addition, MetaFold possessed excellent cell adhesion capability and could promote cell viability and function under dynamic stimulation, thereby maximizing cell activity. Importantly, MetaFold could improve the differentiation efficacy of stem cells into cardiomyocytes and even their maturation, offering high-quality precious candidates for cell therapy. Therefore, we present a dual stimuli-responsive dynamic culture system, which provides a physiologically realistic environment for cell culture and biological study.
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Affiliation(s)
- Jianmei Chen
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Anwei Zhou
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, School of Physics, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, 210093, Nanjing, China
| | - Yuanyuan Nie
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Kerong Chen
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Yu Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Yurui Xu
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
| | - Desheng Kong
- College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210093, China
| | - Kaifeng Shao
- SARI Center for Stem Cell and Nanomedicine, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Xinghai Ning
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China
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11
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Dong X, Overton CM, Tang Y, Darby JP, Sun YP, Yang L. Visible Light-Activated Carbon Dots for Inhibiting Biofilm Formation and Inactivating Biofilm-Associated Bacterial Cells. Front Bioeng Biotechnol 2021; 9:786077. [PMID: 34869296 PMCID: PMC8637124 DOI: 10.3389/fbioe.2021.786077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 10/19/2021] [Indexed: 11/13/2022] Open
Abstract
This study aimed to address the significant problems of bacterial biofilms found in medical fields and many industries. It explores the potential of classic photoactive carbon dots (CDots), with 2,2′-(ethylenedioxy)bis (ethylamine) (EDA) for dot surface functionalization (thus, EDA-CDots) for their inhibitory effect on B. subtilis biofilm formation and the inactivation of B. subtilis cells within established biofilm. The EDA-CDots were synthesized by chemical functionalization of selected small carbon nanoparticles with EDA molecules in amidation reactions. The inhibitory efficacy of CDots with visible light against biofilm formation was dependent significantly on the time point when CDots were added; the earlier the CDots were added, the better the inhibitory effect on the biofilm formation. The evaluation of antibacterial action of light-activated EDA-CDots against planktonic B. subtilis cells versus the cells in biofilm indicate that CDots are highly effective for inactivating planktonic cells but barely inactivate cells in established biofilms. However, when coupling with chelating agents (e.g., EDTA) to target the biofilm architecture by breaking or weakening the EPS protection, much enhanced photoinactivation of biofilm-associated cells by CDots was achieved. The study demonstrates the potential of CDots to prevent the initiation of biofilm formation and to inhibit biofilm growth at an early stage. Strategic combination treatment could enhance the effectiveness of photoinactivation by CDots to biofilm-associated cells.
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Affiliation(s)
- Xiuli Dong
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC, United States
| | | | - Yongan Tang
- Department of Mathematics and Physics, North Carolina Central University, Durham, NC, United States
| | - Jasmine P Darby
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC, United States
| | - Ya-Ping Sun
- Department of Chemistry, Clemson University, Clemson, SC, United States
| | - Liju Yang
- Department of Pharmaceutical Sciences, Biomanufacturing Research Institute and Technology Enterprise (BRITE), North Carolina Central University, Durham, NC, United States
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12
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Yin J, Wood DJ, Russell SJ, Tronci G. Hierarchically Assembled Type I Collagen Fibres as Biomimetic Building Blocks of Biomedical Membranes. Membranes (Basel) 2021; 11:620. [PMID: 34436383 PMCID: PMC8400969 DOI: 10.3390/membranes11080620] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 11/16/2022]
Abstract
Wet spinning is an established fibre manufacturing route to realise collagen fibres with preserved triple helix architecture and cell acceptability for applications in biomedical membranes. However, resulting fibres still need to be chemically modified post-spinning to ensure material integrity in physiological media, with inherent risks of alteration of fibre morphology and with limited opportunities to induce fibrillogenesis following collagen fixation in the crosslinked state. To overcome this challenge, we hypothesised that a photoactive type I collagen precursor bearing either single or multiple monomers could be employed to accomplish hierarchically assembled fibres with improved processability, macroscopic properties and nanoscale organisation via sequential wet spinning and UV-curing. In-house-extracted type I rat tail collagen functionalised with both 4-vinylbenzyl chloride (4VBC) and methacrylate residues generated a full hydrogel network following solubilisation in a photoactive aqueous solution and UV exposure, whereby ~85 wt.% of material was retained following 75-day hydrolytic incubation. Wide-angle X-ray diffraction confirmed the presence of typical collagen patterns, whilst an averaged compression modulus and swelling ratio of more than 290 kPa and 1500 wt.% was recorded in the UV-cured hydrogel networks. Photoactive type I collagen precursors were subsequently wet spun into fibres, displaying the typical dichroic features of collagen and regular fibre morphology. Varying tensile modulus (E = 5 ± 1 - 11 ± 4 MPa) and swelling ratio (SR = 1880 ± 200 - 3350 ± 500 wt.%) were measured following post-spinning UV curing and equilibration with phosphate-buffered saline (PBS). Most importantly, 72-h incubation of the wet spun fibres in PBS successfully induced renaturation of collagen-like fibrils, which were fixed following UV-induced network formation. The whole process proved to be well tolerated by cells, as indicated by a spread-like cell morphology following a 48-h culture of L929 mouse fibroblasts on the extracts of UV-cured fibres.
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Affiliation(s)
- Jie Yin
- Clothworkers’ Centre for Textile Materials Innovation for Healthcare, School of Design, University of Leeds, Leeds LS2 9JT, UK; (J.Y.); (S.J.R.)
- Biomaterials and Tissue Engineering Research Group, School of Dentistry, St. James’s University Hospital, University of Leeds, Leeds LS9 7TF, UK;
| | - David J. Wood
- Biomaterials and Tissue Engineering Research Group, School of Dentistry, St. James’s University Hospital, University of Leeds, Leeds LS9 7TF, UK;
| | - Stephen J. Russell
- Clothworkers’ Centre for Textile Materials Innovation for Healthcare, School of Design, University of Leeds, Leeds LS2 9JT, UK; (J.Y.); (S.J.R.)
| | - Giuseppe Tronci
- Clothworkers’ Centre for Textile Materials Innovation for Healthcare, School of Design, University of Leeds, Leeds LS2 9JT, UK; (J.Y.); (S.J.R.)
- Biomaterials and Tissue Engineering Research Group, School of Dentistry, St. James’s University Hospital, University of Leeds, Leeds LS9 7TF, UK;
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13
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Yang C, Su M, Luo P, Liu Y, Yang F, Li C. A Photosensitive Polymeric Carrier with a Renewable Singlet Oxygen Reservoir Regulated by Two NIR Beams for Enhanced Antitumor Phototherapy. Small 2021; 17:e2101180. [PMID: 34145754 DOI: 10.1002/smll.202101180] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/15/2021] [Indexed: 06/12/2023]
Abstract
Photodynamic therapy (PDT), which utilizes photosensitizer to convert molecular oxygen into singlet oxygen (1 O2 ) upon laser irradiation to ablate tumors, will exacerbate the already oxygen shortage of most solid tumors and is thus self-limiting. Herein, a sophisticated photosensitive polymeric material (An-NP) that allows sustained 1 O2 generation and sufficient oxygen supply during the entire phototherapy is engineered by alternatively applying PDT and photothermal therapy (PTT) controlled by two NIR laser beams. In addition to a photosensitizer that generates 1 O2 , An-NP consists of two other key components: a molecularly designed anthracene derivative capable of trapping/releasing 1 O2 with superior reversibility and a dye J-aggregate with superb photothermal performance. Thus, in 655 nm laser-triggered PDT process, An-NP generates abundant 1 O2 with extra 1 O2 being trapped via the conversion into EPO-NP; while in the subsequent 785 nm laser-driven PTT process, the converted EPO-NP undergoes thermolysis to liberate the captured 1 O2 and regenerates An-NP. The intratumoral oxygen level can be replenished during the PTT cycle for the next round of PDT to generate 1 O2 . The working principle and phototherapy efficacy are preliminarily demonstrated in living cells and tumor-bearing mice, respectively.
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Affiliation(s)
- Chun Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Meihui Su
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Pei Luo
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Yanan Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Feng Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
| | - Changhua Li
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, P. R. China
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14
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Xiao Z, Duan S, Xu P, Cui J, Zhang H, Wang W. Synergistic Speed Enhancement of an Electric-Photochemical Hybrid Micromotor by Tilt Rectification. ACS Nano 2020; 14:8658-8667. [PMID: 32530617 DOI: 10.1021/acsnano.0c03022] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A hybrid micromotor is an active colloid powered by more than one power source, often exhibiting expanded functionality and controllability than those of a singular energy source. However, these power sources are often applied orthogonally, leading to stacked propulsion that is just a sum of two independent mechanisms. Here, we report that TiO2-Pt Janus micromotors, when subject to both UV light and AC electric fields, move up to 90% faster than simply adding up the speed powered by either source. This unexpected synergy between light and electric fields, we propose, arises from the fact that an electrokinetically powered TiO2-Pt micromotor moves near a substrate with a tilted Janus interface that, upon the application of an electric field, becomes rectified to be vertical to the substrate. Control experiments with magnetic fields and three types of micromotors unambiguously and quantitatively show that the tilting angle of a micromotor correlates positively with its instantaneous speed, reaching maximum at a vertical Janus interface. Such "tilting-induced retardation" could affect a wide variety of chemically powered micromotors, and our findings are therefore helpful in understanding the dynamics of micromachines in confinement.
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Affiliation(s)
- Zuyao Xiao
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Shifang Duan
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Pengzhao Xu
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Jingqin Cui
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
| | - Hepeng Zhang
- School of Physics and Astronomy and Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Wei Wang
- School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
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15
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Sehmi SK, Lourenco C, Alkhuder K, Pike SD, Noimark S, Williams CK, Shaffer MSP, Parkin IP, MacRobert AJ, Allan E. Antibacterial Surfaces with Activity against Antimicrobial Resistant Bacterial Pathogens and Endospores. ACS Infect Dis 2020; 6:939-946. [PMID: 32126763 DOI: 10.1021/acsinfecdis.9b00279] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Hospital-acquired bacterial infections are a significant burden on healthcare systems worldwide causing an increased duration of hospital stays and prolonged patient suffering. We show that polyurethane containing crystal violet (CV) and 3-4 nm zinc oxide nanoparticles (ZnO NPs) possesses excellent bactericidal activity against hospital-acquired pathogens including multidrug resistant Escherichia coli (E. coli), Pseudomonas aeruginosa, methicillin-resistant Staphylococcus aureus (MRSA), and even highly resistant endospores of Clostridioides (Clostridium) difficile. Importantly, we used clinical isolates of bacterial strains, a protocol to mimic the environmental conditions of a real exposure in the healthcare setting, and low light intensity equivalent to that encountered in UK hospitals (∼500 lux). Our data shows that ZnO NPs enhance the photobactericidal activity of CV under low intensity light even with short exposure times, and we show that this involves both Type I and Type II photochemical pathways. Interestingly, polyurethane containing ZnO NPs alone showed significant bactericidal activity in the dark against one strain of E. coli, indicating that the NPs possess both light-activated synergistic activity with CV and inherent bactericidal activity that is independent of light. These new antibacterial polymers are potentially useful in healthcare facilties to reduce the transmission of pathogens between people and the environment.
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Affiliation(s)
- Sandeep K. Sehmi
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Claudio Lourenco
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Khaled Alkhuder
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
| | - Sebastian D. Pike
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Sacha Noimark
- Department of Medical Physics and Biomedical Engineering, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Charlotte K. Williams
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Milo S. P. Shaffer
- Department of Chemistry, Imperial College London, Imperial College Road, London SW7 2AZ, United Kingdom
| | - Ivan P. Parkin
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Alexander J. MacRobert
- UCL Division of Surgery and Interventional Science, University College London, Royal Free Campus, Rowland Hill Street, London NW3 2PF, United Kingdom
| | - Elaine Allan
- Division of Microbial Disease, UCL Eastman Dental Institute, University College London, 256 Gray’s Inn Road, London WC1X 8LD, United Kingdom
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16
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He J, Li J, Han Q, Si C, Niu G, Li M, Wang J, Niu J. Photoactive Metal-Organic Framework for the Reduction of Aryl Halides by the Synergistic Effect of Consecutive Photoinduced Electron-Transfer and Hydrogen-Atom-Transfer Processes. ACS Appl Mater Interfaces 2020; 12:2199-2206. [PMID: 31859478 DOI: 10.1021/acsami.9b13538] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Consecutive photoinduced electron transfer (ConPET) has advantages on overcoming the current energetic limitation of visible-light photoredox catalysis for utilizing the energies of two photons in one catalytic cycle. A heterogeneous approach for radical chain reduction of various aryl bromides and chlorides without adding any cocatalyst is introduced by incorporating polyoxometalates (POMs) and amine catalysts into a naphthalenediimide (NDI)-based polymer. CoW-DPNDI-PYI exhibits high activity in the photocatalytic reduction of aryl halides by the synergistic effects of ConPET and hydrogen-atom-transfer (HAT) processes and an enzyme-mimicking CO2 cycloaddition reaction. The ConPET process with N,N'-bis(4-pyridylmethyl)naphthalenediimide (DPNDI) facilitates effective solar energy conversion. POMs and amine catalysts, as efficient HAT catalysts and electron donors, improve the generation of the ConPET process. The success of this work demonstrates the great application of the synergistic effects of ConPET and HAT processes in heterogeneous photocatalysis C-H arylation.
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Affiliation(s)
- Jiachen He
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Jie Li
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Qiuxia Han
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Chen Si
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Guiqin Niu
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Mingxue Li
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Jingping Wang
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
| | - Jingyang Niu
- Key Laboratory of Polyoxometalate Chemistry of Henan Province, School of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , P. R. China
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17
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Martínez NP, Inostroza-Rivera R, Durán B, Molero L, Bonardd S, Ramírez O, Isaacs M, Díaz Díaz D, Leiva A, Saldías C. Exploring the Effect of the Irradiation Time on Photosensitized Dendrimer-Based Nanoaggregates for Potential Applications in Light-Driven Water Photoreduction. Nanomaterials (Basel) 2019; 9:E1316. [PMID: 31540072 PMCID: PMC6781091 DOI: 10.3390/nano9091316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 08/26/2019] [Accepted: 09/10/2019] [Indexed: 01/09/2023]
Abstract
Fourth generation polyamidoamine dendrimer (PAMAM, G4) modified with fluorescein units (F) at the periphery and Pt nanoparticles stabilized by L-ascorbate were prepared. These dendrimers modified with hydrophobic fluorescein were used to achieve self-assembling structures, giving rise to the formation of nanoaggregates in water. The photoactive fluorescein units were mainly used as photosensitizer units in the process of the catalytic photoreduction of water propitiated by light. Complementarily, Pt-ascorbate nanoparticles acted as the active sites to generate H2. Importantly, the study of the functional, optical, surface potential and morphological properties of the photosensitized dendrimer aggregates at different irradiation times allowed for insights to be gained into the behavior of these systems. Thus, the resultant photosensitized PAMAM-fluorescein (G4-F) nanoaggregates (NG) were conveniently applied to light-driven water photoreduction along with sodium L-ascorbate and methyl viologen as the sacrificial reagent and electron relay agent, respectively. Notably, these aggregates exhibited appropriate stability and catalytic activity over time for hydrogen production. Additionally, in order to propose a potential use of these types of systems, the in situ generated H2 was able to reduce a certain amount of methylene blue (MB). Finally, theoretical electronic analyses provided insights into the possible excited states of the fluorescein molecules that could intervene in the global mechanism of H2 generation.
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Affiliation(s)
- Natalia P Martínez
- Departamento de Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Macul, 7820436 Santiago, Chile.
| | | | - Boris Durán
- Centro de Investigación en Nanotecnología y Materiales Avanzados, Pontificia Universidad Católica de Chile, 7820436 Macul, Chile.
| | - Leonard Molero
- Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8320000 Santiago, Chile.
| | - Sebastián Bonardd
- Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8320000 Santiago, Chile.
| | - Oscar Ramírez
- Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8320000 Santiago, Chile.
| | - Mauricio Isaacs
- Departamento de Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Macul, 7820436 Santiago, Chile.
- Centro de Investigación en Nanotecnología y Materiales Avanzados, Pontificia Universidad Católica de Chile, 7820436 Macul, Chile.
| | - David Díaz Díaz
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany.
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206 La Laguna, 38206 Tenerife, Spain.
| | - Angel Leiva
- Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8320000 Santiago, Chile.
| | - César Saldías
- Centro de Nanotecnología Aplicada, Facultad de Ciencias, Universidad Mayor, 8320000 Santiago, Chile.
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18
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Ngongang Ndjawa GO, Tchalala MR, Shekhah O, Khan JI, Mansour AE, Czaban-Jóźwiak J, Weselinski LJ, Ait Ahsaine H, Amassian A, Eddaoudi M. The Growth of Photoactive Porphyrin-Based MOF Thin Films Using the Liquid-Phase Epitaxy Approach and their Optoelectronic Properties. Materials (Basel) 2019; 12:E2457. [PMID: 31375019 DOI: 10.3390/ma12152457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/24/2019] [Accepted: 07/25/2019] [Indexed: 11/17/2022]
Abstract
This study reports on the optoelectronic properties of porphyrin-based metal–organic framework (MOF) thin films fabricated by a facile liquid-phase epitaxy approach. This approach affords the growth of MOF thin films that are free of morphological imperfections, more suitable for optoelectronic applications. Chemical modifications such as the porphyrin ligand metallation have been found to preserve the morphology of the grown films making this approach particularly suitable for molecular alteration of MOF thin film optoelectronic properties without compromising its mesoscale morphology significantly. Particularly, the metallation of the ligand was found to be effective to tune the MOF bandgap. These porphyrin-based MOF thin films were shown to function effectively as donor layers in solar cells based on a Fullerene-C60 acceptor. The ability to fabricate MOF solar cells free of a liquid-phase acceptor greatly simplifies device fabrication and enables pairing of MOFs as light absorbers with a wide range of acceptors including non-fullerene acceptors.
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19
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Sultana A, Sadhukhan P, Alam MM, Das S, Middya TR, Mandal D. Organo-Lead Halide Perovskite Induced Electroactive β-Phase in Porous PVDF Films: An Excellent Material for Photoactive Piezoelectric Energy Harvester and Photodetector. ACS Appl Mater Interfaces 2018; 10:4121-4130. [PMID: 29308647 DOI: 10.1021/acsami.7b17408] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Methylammonium lead iodide (CH3NH3PbI3) (MAPI)-embedded β-phase comprising porous poly(vinylidene fluoride) (PVDF) composite (MPC) films turns to an excellent material for energy harvester and photodetector (PD). MAPI enables to nucleate up to ∼91% of electroactive phase in PVDF to make it suitable for piezoelectric-based mechanical energy harvesters (PEHs), sensors, and actuators. The piezoelectric energy generation from PEH made with MPC film has been demonstrated under a simple human finger touch motion. In addition, the feasibility of photosensitive properties of MPC films are manifested under the illumination of nonmonochromatic light, which also promises the application as organic photodetectors. Furthermore, fast rising time and instant increase in the current under light illumination have been observed in an MPC-based photodetector (PD), which indicates of its potential utility in efficient photoactive device. Owing to the photoresponsive and electroactive nature of MPC films, a new class of stand-alone self-powered flexible photoactive piezoelectric energy harvester (PPEH) has been fabricated. The simultaneous mechanical energy-harvesting and visible light detection capability of the PPEH is promising in piezo-phototronics technology.
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Affiliation(s)
| | | | | | | | | | - Dipankar Mandal
- Institute of Nano Science and Technology (INST) , Phase-10, Sector-64, Mohali 160062, India
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20
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Miller TS, Suter TM, Telford AM, Picco L, Payton OD, Russell-Pavier F, Cullen PL, Sella A, Shaffer MSP, Nelson J, Tileli V, McMillan PF, Howard CA. Single Crystal, Luminescent Carbon Nitride Nanosheets Formed by Spontaneous Dissolution. Nano Lett 2017; 17:5891-5896. [PMID: 28678518 DOI: 10.1021/acs.nanolett.7b01353] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A primary method for the production of 2D nanosheets is liquid-phase delamination from their 3D layered bulk analogues. Most strategies currently achieve this objective by significant mechanical energy input or chemical modification but these processes are detrimental to the structure and properties of the resulting 2D nanomaterials. Bulk poly(triazine imide) (PTI)-based carbon nitrides are layered materials with a high degree of crystalline order. Here, we demonstrate that these semiconductors are spontaneously soluble in select polar aprotic solvents, that is, without any chemical or physical intervention. In contrast to more aggressive exfoliation strategies, this thermodynamically driven dissolution process perfectly maintains the crystallographic form of the starting material, yielding solutions of defect-free, hexagonal 2D nanosheets with a well-defined size distribution. This pristine nanosheet structure results in narrow, excitation-wavelength-independent photoluminescence emission spectra. Furthermore, by controlling the aggregation state of the nanosheets, we demonstrate that the emission wavelengths can be tuned from narrow UV to broad-band white. This has potential applicability to a range of optoelectronic devices.
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Affiliation(s)
- Thomas S Miller
- Department of Chemistry, Christopher Ingold Laboratory, University College London , 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - Theo M Suter
- Department of Chemistry, Christopher Ingold Laboratory, University College London , 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - Andrew M Telford
- Department of Physics and Centre for Plastic Electronics, Imperial College London , London SW7 2BW, United Kingdom
| | - Loren Picco
- Interface Analysis Centre, H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom
| | - Oliver D Payton
- Interface Analysis Centre, H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom
| | - Freddie Russell-Pavier
- Interface Analysis Centre, H. H. Wills Physics Laboratory, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, United Kingdom
| | - Patrick L Cullen
- Department of Physics & Astronomy, University College London , London WC1E 6BT, United Kingdom
| | - Andrea Sella
- Department of Chemistry, Christopher Ingold Laboratory, University College London , 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - Milo S P Shaffer
- Department of Chemistry, Imperial College London , Exhibition Road, London SW7 2AZ, United Kingdom
| | - Jenny Nelson
- Department of Physics and Centre for Plastic Electronics, Imperial College London , London SW7 2BW, United Kingdom
| | - Vasiliki Tileli
- # Institute of Materials, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - Paul F McMillan
- Department of Chemistry, Christopher Ingold Laboratory, University College London , 20 Gordon Street, London WC1H OAJ, United Kingdom
| | - Christopher A Howard
- Department of Physics & Astronomy, University College London , London WC1E 6BT, United Kingdom
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