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Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System

In this paper, an Ag/MoO(3) composite system was cosputtered by Ar plasma bombardment on a polystyrene (PS) colloidal microsphere array. The MoO(3) formed by this method contained abundant oxygen vacancy defects, which provided a channel for charge transfer in the system and compensated for the wide...

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Autores principales: Chu, Qi, Li, Jingmeng, Jin, Sila, Guo, Shuang, Park, Eungyeong, Wang, Jiku, Chen, Lei, Jung, Young Mee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156517/
https://www.ncbi.nlm.nih.gov/pubmed/34069016
http://dx.doi.org/10.3390/nano11051292
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author Chu, Qi
Li, Jingmeng
Jin, Sila
Guo, Shuang
Park, Eungyeong
Wang, Jiku
Chen, Lei
Jung, Young Mee
author_facet Chu, Qi
Li, Jingmeng
Jin, Sila
Guo, Shuang
Park, Eungyeong
Wang, Jiku
Chen, Lei
Jung, Young Mee
author_sort Chu, Qi
collection PubMed
description In this paper, an Ag/MoO(3) composite system was cosputtered by Ar plasma bombardment on a polystyrene (PS) colloidal microsphere array. The MoO(3) formed by this method contained abundant oxygen vacancy defects, which provided a channel for charge transfer in the system and compensated for the wide band gap of MoO(3). Various characterization methods strongly demonstrated the existence of oxygen vacancy defects and detected the properties of oxygen vacancies. 4-Aminothiophenol (p-aminothiophenol, PATP) was used as a candidate surface-enhanced Raman scattering (SERS) probe molecule to evaluate the contribution of the oxygen vacancy defects in the Ag/MoO(3) composite system. Interestingly, oxygen vacancy defects are a kind of charge channel, and their powerful effect is fully reflected in their SERS spectra. Increasing the number of charge channels and increasing the utilization rate of the channels caused the frequency of SERS characteristic peaks to shift. This interesting phenomenon opens up a new horizon for the study of SERS in oxygen-containing semiconductors and provides a powerful reference for the study of PATP.
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spelling pubmed-81565172021-05-28 Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System Chu, Qi Li, Jingmeng Jin, Sila Guo, Shuang Park, Eungyeong Wang, Jiku Chen, Lei Jung, Young Mee Nanomaterials (Basel) Article In this paper, an Ag/MoO(3) composite system was cosputtered by Ar plasma bombardment on a polystyrene (PS) colloidal microsphere array. The MoO(3) formed by this method contained abundant oxygen vacancy defects, which provided a channel for charge transfer in the system and compensated for the wide band gap of MoO(3). Various characterization methods strongly demonstrated the existence of oxygen vacancy defects and detected the properties of oxygen vacancies. 4-Aminothiophenol (p-aminothiophenol, PATP) was used as a candidate surface-enhanced Raman scattering (SERS) probe molecule to evaluate the contribution of the oxygen vacancy defects in the Ag/MoO(3) composite system. Interestingly, oxygen vacancy defects are a kind of charge channel, and their powerful effect is fully reflected in their SERS spectra. Increasing the number of charge channels and increasing the utilization rate of the channels caused the frequency of SERS characteristic peaks to shift. This interesting phenomenon opens up a new horizon for the study of SERS in oxygen-containing semiconductors and provides a powerful reference for the study of PATP. MDPI 2021-05-14 /pmc/articles/PMC8156517/ /pubmed/34069016 http://dx.doi.org/10.3390/nano11051292 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Chu, Qi
Li, Jingmeng
Jin, Sila
Guo, Shuang
Park, Eungyeong
Wang, Jiku
Chen, Lei
Jung, Young Mee
Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title_full Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title_fullStr Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title_full_unstemmed Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title_short Charge-Transfer Induced by the Oxygen Vacancy Defects in the Ag/MoO(3) Composite System
title_sort charge-transfer induced by the oxygen vacancy defects in the ag/moo(3) composite system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156517/
https://www.ncbi.nlm.nih.gov/pubmed/34069016
http://dx.doi.org/10.3390/nano11051292
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