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Dzhagan V, Mazur N, Kapush O, Selyshchev O, Karnaukhov A, Yeshchenko OA, Danylenko MI, Yukhymchuk V, Zahn DRT. Core and Shell Contributions to the Phonon Spectra of CdTe/CdS Quantum Dots. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:921. [PMID: 36903799 PMCID: PMC10004847 DOI: 10.3390/nano13050921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 02/20/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The parameters of the shell and interface in semiconductor core/shell nanocrystals (NCs) are determinant for their optical properties and charge transfer but are challenging to be studied. Raman spectroscopy was shown earlier to be a suitable informative probe of the core/shell structure. Here, we report the results of a spectroscopic study of CdTe NCs synthesized by a facile route in water, using thioglycolic acid (TGA) as a stabilizer. Both core-level X-ray photoelectron (XPS) and vibrational (Raman and infrared) spectra show that using thiol during the synthesis results in the formation of a CdS shell around the CdTe core NCs. Even though the spectral positions of the optical absorption and photoluminescence bands of such NCs are determined by the CdTe core, the far-infrared absorption and resonant Raman scattering spectra are dominated by the vibrations related with the shell. The physical mechanism of the observed effect is discussed and opposed to the results reported before for thiol-free CdTe Ns as well as CdSe/CdS and CdSe/ZnS core/shell NC systems, where the core phonons were clearly detected under similar experimental conditions.
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Affiliation(s)
- Volodymyr Dzhagan
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
- Physics Department, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine
| | - Nazar Mazur
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - Olga Kapush
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - Oleksandr Selyshchev
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
| | - Anatolii Karnaukhov
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - Oleg A. Yeshchenko
- Physics Department, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine
| | - Mykola I. Danylenko
- Frantsevich Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine
| | - Volodymyr Yukhymchuk
- V. Lashkaryov Institute of Semiconductors Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - Dietrich R. T. Zahn
- Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Chemnitz University of Technology, D-09107 Chemnitz, Germany
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2
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Silva JF, Maria de Oliveira J, Silva WF, Costa Soares AC, Rocha U, Oliveira Dantas N, Alves da Silva Filho E, Duzzioni M, Helmut Rulf Cofré A, Wagner de Castro O, Anhezini L, Christine Almeida Silva A, Jacinto C. Supersensitive nanothermometer based on CdSe/CdSxSe1-x magic-sized quantum dots with in vivo low toxicity. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Ur Rahman A, Sadiq T, Khan R, Anwar R, Gul B, Dahshan A. Tunable electronic and magnetic properties of single layer CdS via Li substitutional doping: A first-principle study. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 2022; 161:110380. [DOI: 10.1016/j.jpcs.2021.110380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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4
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Development of novel paper-based electrochemical device modified with CdSe/CdS magic-sized quantum dots and application for the sensing of dopamine. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137486] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Wang B, Liu L, Zhang Y, Deng Y, Dong A. A novel strategy for boosting the photoluminescence quantum efficiency of CdSe nanocrystals at room temperature. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.03.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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6
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Fan XB, Yu S, Wang X, Li ZJ, Zhan F, Li JX, Gao YJ, Xia AD, Tao Y, Li XB, Zhang LP, Tung CH, Wu LZ. Susceptible Surface Sulfide Regulates Catalytic Activity of CdSe Quantum Dots for Hydrogen Photogeneration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1804872. [PMID: 30570781 DOI: 10.1002/adma.201804872] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 10/27/2018] [Indexed: 06/09/2023]
Abstract
Semiconducting quantum dots (QDs) have recently triggered a huge interest in constructing efficient hydrogen production systems. It is well established that a large fraction of surface atoms of QDs need ligands to stabilize and avoid them from aggregating. However, the influence of the surface property of QDs on photocatalysis is rather elusive. Here, the surface regulation of CdSe QDs is investigated by surface sulfide ions (S2- ) for photocatalytic hydrogen evolution. Structural and spectroscopic study shows that with gradual addition of S2- , S2- first grows into the lattice and later works as ligands on the surface of CdSe QDs. In-depth transient spectroscopy reveals that the initial lattice S2- accelerates electron transfer from QDs to cocatalyst, and the following ligand S2- mainly facilitates hole transfer from QDs to the sacrificial agent. As a result, a turnover frequency (TOF) of 7950 h-1 can be achieved by the S2- modified CdSe QDs, fourfold higher than that of original mercaptopropionic acid (MPA) capped CdSe QDs. Clearly, the simple surface S2- modification of QDs greatly increases the photocatalytic efficiency, which provides subtle methods to design new QD material for advanced photocatalysis.
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Affiliation(s)
- Xiang-Bing Fan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Shan Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xian Wang
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Zhi-Jun Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Fei Zhan
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jia-Xin Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu-Ji Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - An-Dong Xia
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Ye Tao
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Ping Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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7
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Dias EHV, Pereira DFC, de Sousa BB, Matias MS, de Queiroz MR, Santiago FM, Silva ACA, Dantas NO, Santos-Filho NA, de Oliveira F. In vitro tracking of phospholipase A 2 from snake venom conjugated with magic-sized quantum dots. Int J Biol Macromol 2018; 122:461-468. [PMID: 30385337 DOI: 10.1016/j.ijbiomac.2018.10.185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/20/2018] [Accepted: 10/27/2018] [Indexed: 01/09/2023]
Abstract
Phospholipases A2 represent a family of enzymes with important application in medicine. However, direct tracking is difficult due to the absence of a stable, effective and specific marker for these enzymes. Magic-sized quantum dots (MSQDs) are inorganic semiconducting nanocrystals with unique physical properties. They have the ability to conjugate to proteins, making them excellent markers for biological systems. In this work, we labelled phospholipase A2 from Bothrops alternatus snake venom with Cadmium selenide (CdSe)/cadmium sulphate (CdS) MSQDs-a biocompatible and luminescent probe-. Bioconjugation was confirmed using infrared spectra and fluorescence microscopy, which demonstrated that the CdSe/CdS MSQDs interact with phospholipase A2 without interfering with its activity. This probe may be an important tool for the elucidation of many biological mechanisms, because it allows the pathway of phospholipase A2 to be tracked from its entry through the plasma membrane until its incorporation into the nucleus of myoblasts.
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Affiliation(s)
- Edigar H V Dias
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Déborah F C Pereira
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Bruna B de Sousa
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil; Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Mariana S Matias
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Mayara R de Queiroz
- Instituto de Genética e Bioquímica, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil; Instituto Nacional de Ciência e Tecnologia em Nano-Biofarmacêutica (N-Biofar), Belo Horizonte, MG, Brazil
| | - Fernanda M Santiago
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Anielle C A Silva
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Noelio O Dantas
- Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | | | - Fábio de Oliveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil; Instituto Nacional de Ciência e Tecnologia em Nano-Biofarmacêutica (N-Biofar), Belo Horizonte, MG, Brazil.
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8
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Ben Brahim N, Poggi M, Lambry JC, Bel Haj Mohamed N, Ben Chaâbane R, Negrerie M. Density of Grafted Chains in Thioglycerol-Capped CdS Quantum Dots Determines Their Interaction with Aluminum(III) in Water. Inorg Chem 2018; 57:4979-4988. [DOI: 10.1021/acs.inorgchem.7b03254] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Nassim Ben Brahim
- Laboratoire des Interfaces et Matériaux Avancés, Faculté des Sciences de Monastir, Boulevard de l’Environnement, 5019 Monastir, Tunisia
| | - Mélanie Poggi
- Laboratoire de Physique de la Matière Condensée, CNRS UMR7643, Ecole Polytechnique, 91128 Palaiseau, France
| | - Jean-Christophe Lambry
- Laboratoire d’Optique et Biosciences, INSERM U1182, CNRS UMR7645, Ecole Polytechnique, 91128 Palaiseau, France
| | - Naim Bel Haj Mohamed
- Laboratoire des Interfaces et Matériaux Avancés, Faculté des Sciences de Monastir, Boulevard de l’Environnement, 5019 Monastir, Tunisia
| | - Rafik Ben Chaâbane
- Laboratoire des Interfaces et Matériaux Avancés, Faculté des Sciences de Monastir, Boulevard de l’Environnement, 5019 Monastir, Tunisia
| | - Michel Negrerie
- Laboratoire d’Optique et Biosciences, INSERM U1182, CNRS UMR7645, Ecole Polytechnique, 91128 Palaiseau, France
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9
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Susha N, Nandakumar K, Nair SS. Enhanced photoconductivity in CdS/betanin composite nanostructures. RSC Adv 2018; 8:11330-11337. [PMID: 35542820 PMCID: PMC9079048 DOI: 10.1039/c7ra13116j] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 03/07/2018] [Indexed: 11/21/2022] Open
Abstract
The synthesis is described of inorganic/organic hybrid nanostructured composites based on CdS/betanin with enhanced photoconductivity due to the transfer of photogenerated electrons from the conduction band of betanin to the conduction band of CdS.
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Affiliation(s)
- N. Susha
- Dept. of Physics
- Central University of Kerala
- India – 671314
| | - K. Nandakumar
- International and Inter University Centre for Nanoscience and Nanotechnology
- Mahatma Gandhi University
- India – 686 560
| | - Swapna S. Nair
- Dept. of Physics
- Central University of Kerala
- India – 671314
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10
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Barroso J, Díez-Buitrago B, Saa L, Möller M, Briz N, Pavlov V. Specific bioanalytical optical and photoelectrochemical assays for detection of methanol in alcoholic beverages. Biosens Bioelectron 2017; 101:116-122. [PMID: 29055193 DOI: 10.1016/j.bios.2017.10.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 12/29/2022]
Abstract
Methanol is a poison which is frequently discovered in alcoholic beverages. Innovative methods to detect methanol in alcoholic beverages are being constantly developed. We report for the first time a new strategy for the detection of methanol using fluorescence spectroscopy and photoelectrochemical (PEC) analysis. The analytical system is based on the oxidation of cysteine (CSH) with hydrogen peroxide (H2O2) enzymatically generated by alcohol oxidase (AOx). H2O2 oxidizes capping agent CSH, modulating the growth of CSH-stabilized cadmium sulphide quantum dots (CdS QDs). Disposable screen-printed carbon electrodes (SPCEs) modified with a conductive osmium polymer (Os-PVP) complex were employed to quantify resulting CdS QDs. This polymer facilitates the "wiring" of in situ enzymatically generated CdS QDs, which photocatalyze oxidation of 1-thioglycerol (TG), generating photocurrent as the readout signal. Likewise, we proved that our systems did not suffer from interference by ethanol. The PEC assays showed better sensitivity than conventional methods, covering a wide range of potential applications for methanol quantification.
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Affiliation(s)
- Javier Barroso
- Biosensing Laboratory. CIC biomaGUNE. Paseo Miramón 182, San Sebastián 20014, Spain
| | - Beatriz Díez-Buitrago
- Biosensing Laboratory. CIC biomaGUNE. Paseo Miramón 182, San Sebastián 20014, Spain; Tecnalia, Paseo Mikeletegi, San Sebastián 20009, Spain
| | - Laura Saa
- Biosensing Laboratory. CIC biomaGUNE. Paseo Miramón 182, San Sebastián 20014, Spain
| | - Marco Möller
- Biosensing Laboratory. CIC biomaGUNE. Paseo Miramón 182, San Sebastián 20014, Spain
| | - Nerea Briz
- Tecnalia, Paseo Mikeletegi, San Sebastián 20009, Spain.
| | - Valeri Pavlov
- Biosensing Laboratory. CIC biomaGUNE. Paseo Miramón 182, San Sebastián 20014, Spain.
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11
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Chen X, Ok YS, Mohan D, Pittman CU, Dou X. The stability and removal of water-dispersed CdSe/CdS core-shell quantum dots from water. CHEMOSPHERE 2017; 185:926-933. [PMID: 28747004 DOI: 10.1016/j.chemosphere.2017.07.083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 06/15/2017] [Accepted: 07/16/2017] [Indexed: 06/07/2023]
Abstract
The increasingly wide use of semiconductor nanocrystals inevitably leads to their release into aquatic environment. The aggregation behaviors of 3-mercaptopropionic acid-capped CdSe/CdS core-shell quantum dots (MPA-QDs) under various water chemistry conditions were examined and their removal using Fe3+ and Al3+ coagulants was evaluated. Cationic species rather than concentrations affected the stability of MPA-QDs. Adding 2 mM Ca2+ led to a much larger ζ-potential decrease and particle size increase than adding 150 mM K+ at each tested solution pH. This indicated that complexation and depletion of surface-bound carboxyl groups by divalent Ca2+ has a more pronounced effect than compression of the electrical double layer by high concentrations of monovalent K+. The presence of humic acid increased the stability of MPA-QDs, which might increase negative surface charging via overcoating or bind to the surface of MPA-QDs. The nanoparticles exhibited similar aggregation kinetics patterns in tap water and seawater, but varying patterns in the lake water because of the co-existence of 2.3 mM total of Ca2+ and Mg2+. MPA-QDs (5 mg L-1) were readily coagulated by 2.4 mM Al3+ or 1.2 mM Fe3+ in tap water. Al3+ and Fe3+ can bind with carboxyl groups of the surface capping ligands, neutralize the negative charges on the surface of MPA-QDs and decrease the electrostatic repulsion forces to induce MPA-QDs aggregation. In addition, MPA-QDs could be bound with and wrapped into the flocs of hydrolysis products of coagulants. The results reported here could help broaden our understanding of the impacts and remediation of water-dispersed core-shell QD nanoparticles.
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Affiliation(s)
- Xu Chen
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China
| | - Yong Sik Ok
- Korea Biochar Research Center, Kangwon National University, Chuncheon, 24341, South Korea; O-Jeong Eco-Resilience Institute (OJERI) & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea
| | - Dinesh Mohan
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Charles U Pittman
- Department of Chemistry, Mississippi State University, Mississippi, Mississippi State, 39762, United States
| | - Xiaomin Dou
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, PR China.
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13
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Li XB, Gao YJ, Wang Y, Zhan F, Zhang XY, Kong QY, Zhao NJ, Guo Q, Wu HL, Li ZJ, Tao Y, Zhang JP, Chen B, Tung CH, Wu LZ. Self-Assembled Framework Enhances Electronic Communication of Ultrasmall-Sized Nanoparticles for Exceptional Solar Hydrogen Evolution. J Am Chem Soc 2017; 139:4789-4796. [DOI: 10.1021/jacs.6b12976] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xu-Bing Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yu-Ji Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yang Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Fei Zhan
- Beijing
Synchrotron Radiation Facility, Institute of High Energy Physics, the Chinese Academy of Sciences Beijing 100049, P.R. China
| | - Xiao-Yi Zhang
- X-ray
Sciences Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60430, United States
| | - Qing-Yu Kong
- Synchrotron Soleil, L’Orme
des Merisiers St-Aubin, 91192 Gif-sur-Yvette Cedex, France
| | - Ning-Jiu Zhao
- Department
of Chemistry, Renmin University of China, Beijing 100872, P.R. China
| | - Qing Guo
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Hao-Lin Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Zhi-Jun Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Ye Tao
- Beijing
Synchrotron Radiation Facility, Institute of High Energy Physics, the Chinese Academy of Sciences Beijing 100049, P.R. China
| | - Jian-Ping Zhang
- Department
of Chemistry, Renmin University of China, Beijing 100872, P.R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P. R. China
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14
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Zhou C, Chen Q, Wang G, Guan A, Xu J, Liu X, Shi Z, Zhou L. One-pot synthesis of CdSe@CdS core@shell quantum dots and their photovoltaics application in quantum-dot-sensitized ZnO nanorods. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.08.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Dzhagan V, Milekhin AG, Valakh MY, Pedetti S, Tessier M, Dubertret B, Zahn DRT. Morphology-induced phonon spectra of CdSe/CdS nanoplatelets: core/shell vs. core-crown. NANOSCALE 2016; 8:17204-17212. [PMID: 27722399 DOI: 10.1039/c6nr06949e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Recently developed two-dimensional colloidal semiconductor nanocrystals, or nanoplatelets (NPLs), extend the palette of solution-processable free-standing 2D nanomaterials of high performance. Growing CdSe and CdS parts subsequently in either side-by-side or stacked manner results in core-crown or core/shell structures, respectively. Both kinds of heterogeneous NPLs find efficient applications and represent interesting materials to study the electronic and lattice excitations and interaction between them under strong one-directional confinement. Here, we investigated by Raman and infrared spectroscopy the phonon spectra and electron-phonon coupling in CdSe/CdS core/shell and core-crown NPLs. A number of distinct spectral features of the two NPL morphologies are observed, which are further modified by tuning the laser excitation energy Eexc between in- and off-resonant conditions. The general difference is the larger number of phonon modes in core/shell NPLs and their spectral shifts with increasing shell thickness, as well as with Eexc. This behaviour is explained by strong mutual influence of the core and shell and formation of combined phonon modes. In the core-crown structure, the CdSe and CdS modes preserve more independent behaviour with only interface modes forming the phonon overtones with phonons of the core.
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Affiliation(s)
- V Dzhagan
- Semiconductor Physics, Technische Universität Chemnitz, D-09107 Chemnitz, Germany. and V.E. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - A G Milekhin
- A.V. Rzhanov Institute of Semiconductor Physics, 630090 Novosibirsk, Russia and Novosibirsk State University, Pirogova street 2, 630090 Novosibirsk, Russia
| | - M Ya Valakh
- V.E. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
| | - S Pedetti
- Laboratoire de Physique et d'Étude des Matériaux, PSL Research University, CNRS UMR 8213, Sorbonne Universités UPMC Univ Paris 06, ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France
| | - M Tessier
- Laboratoire de Physique et d'Étude des Matériaux, PSL Research University, CNRS UMR 8213, Sorbonne Universités UPMC Univ Paris 06, ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France
| | - B Dubertret
- Laboratoire de Physique et d'Étude des Matériaux, PSL Research University, CNRS UMR 8213, Sorbonne Universités UPMC Univ Paris 06, ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France
| | - D R T Zahn
- Semiconductor Physics, Technische Universität Chemnitz, D-09107 Chemnitz, Germany.
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Zhao H, Benetti D, Jin L, Zhou Y, Rosei F, Vomiero A. Absorption Enhancement in "Giant" Core/Alloyed-Shell Quantum Dots for Luminescent Solar Concentrator. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:5354-5365. [PMID: 27515385 DOI: 10.1002/smll.201600945] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 06/20/2016] [Indexed: 05/20/2023]
Abstract
Luminescent solar concentrators (LSCs) can potentially reduce the cost of solar cells by decreasing the photoactive area of the device and boosting the photoconversion efficiency (PCE). This study demonstrates the application of "giant" CdSe/Cdx Pb1-x S core/shell quantum dots (QDs) as light harvesters in high performance LSCs with over 1.15% PCE. Pb addition is critical to maximize PCE. First, this study synthesizes "giant" CdSe/Cdx Pb1-x S QDs with high quantum yield (40%), narrow size distribution (<10%), and stable photoluminescence in a wide temperature range (100-300 K). Subsequently these thick alloyed-shell QDs are embedded in a polymer matrix, resulting in a highly transparent composite with absorption spectrum covering the range 300-600 nm, and are applied as active material for prototype LSCs. The latter exhibits a 15% enhancement in efficiency with respect to 1% PCE of the pure-CdS-shelled QDs. This study attributes this increase to the contribution of Pb doping. The results demonstrate a straightforward approach to enhance light absorption in "giant" QDs by metal doping, indicating a promising route to broaden the absorption spectrum and increase the efficiency of LSCs.
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Affiliation(s)
- Haiguang Zhao
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, J3X1S2, Canada.
| | - Daniele Benetti
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, J3X1S2, Canada
| | - Lei Jin
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, J3X1S2, Canada
| | - Yufeng Zhou
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, J3X1S2, Canada
| | - Federico Rosei
- Centre for Energy, Materials and Telecommunications, Institut National de la Recherche Scientifique, Université du Québec, 1650 Boulevard Lionel-Boulet, Varennes, Québec, J3X1S2, Canada.
- Institute for Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu, 610054, P. R. China.
| | - Alberto Vomiero
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, Luleå, 971 98, Sweden.
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18
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Biological analysis and imaging applications of CdSe/CdSxSe1−x/CdS core–shell magic-sized quantum dot. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:1421-30. [DOI: 10.1016/j.nano.2016.01.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 12/29/2015] [Accepted: 01/05/2016] [Indexed: 12/15/2022]
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Guan X, Fan H, Jia T, Zhang D, Zhang Y, Lei Z, Lai S. A Versatile Synthetic Approach to Covalent Binding of Polymer Brushes on CdSe/CdS Quantum Dots Surface: Multitype Modification of Nanocrystals. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201500323] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaolin Guan
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Hongting Fan
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Tianming Jia
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Donghai Zhang
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Yang Zhang
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Ziqiang Lei
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
| | - Shoujun Lai
- Key Laboratory of Eco-Environment-Related Polymer Materials; Ministry of Education; Gansu 730070 P. R. China
- Key Laboratory of Polymer Materials; Ministry of Gansu Province; Gansu 730070 P. R. China
- College of Chemistry and Chemical Engineering; Northwest Normal University; Gansu 730070 P. R. China
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Jing L, Kershaw SV, Kipp T, Kalytchuk S, Ding K, Zeng J, Jiao M, Sun X, Mews A, Rogach AL, Gao M. Insight into strain effects on band alignment shifts, carrier localization and recombination kinetics in CdTe/CdS core/shell quantum dots. J Am Chem Soc 2015; 137:2073-84. [PMID: 25594869 DOI: 10.1021/ja5127352] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The impact of strain on the optical properties of semiconductor quantum dots (QDs) is fundamentally important while still awaiting detailed investigation. CdTe/CdS core/shell QDs represent a typical strained system due to the substantial lattice mismatch between CdTe and CdS. To probe the strain-related effects, aqueous CdTe/CdS QDs were synthesized by coating different sized CdTe QD cores with CdS shells upon the thermal decomposition of glutathione as a sulfur source under reflux. The shell growth was carefully monitored by both steady-state absorption and fluorescence spectroscopy and transient fluorescence spectroscopy. In combination with structural analysis, the band alignments as a consequence of the strain were modified based on band deformation potential theory. By further taking account of these strain-induced band shifts, the effective mass approximation (EMA) model was modified to simulate the electronic structure, carrier spatial localization, and electron-hole wave function overlap for comparing with experimentally derived results. In particular, the electron/hole eigen energies were predicted for a range of structures with different CdTe core sizes and different CdS shell thicknesses. The overlap of electron and hole wave functions was further simulated to reveal the impact of strain on the electron-hole recombination kinetics as the electron wave function progressively shifts into the CdS shell region while the hole wave function remains heavily localized in CdTe core upon the shell growth. The excellent agreement between the strain-modified EMA model with the experimental data suggests that strain exhibits remarkable effects on the optical properties of mismatched core/shell QDs by altering the electronic structure of the system.
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Affiliation(s)
- Lihong Jing
- Institute of Chemistry, Chinese Academy of Sciences , Bei Yi Jie 2, Zhong Guan Cun, Beijing 100190, China
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