Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering

Compared with the noble-metal surface-enhanced Raman scattering (SERS) substrates activated by the surface plasmon resonance (SPR)-induced electromagnetic mechanism (EM), the relative low sensitivity and stability of the chemical mechanism (CM)-based substrates are the biggest obstacles to their app...

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Main Authors: Tian, Zheng, Bai, Hua, Chen, Chao, Ye, Yuting, Kong, Qinghong, Li, Yahui, Fan, Wenhao, Yi, Wencai, Xi, Guangcheng
其他作者: School of Materials Science and Engineering
格式: Article
語言:English
出版: 2020
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在線閱讀:https://hdl.handle.net/10356/141993
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機構: Nanyang Technological University
語言: English
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spelling sg-ntu-dr.10356-1419932023-07-14T15:56:19Z Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering Tian, Zheng Bai, Hua Chen, Chao Ye, Yuting Kong, Qinghong Li, Yahui Fan, Wenhao Yi, Wencai Xi, Guangcheng School of Materials Science and Engineering Engineering::Materials Physical Chemistry Electromagnetics Compared with the noble-metal surface-enhanced Raman scattering (SERS) substrates activated by the surface plasmon resonance (SPR)-induced electromagnetic mechanism (EM), the relative low sensitivity and stability of the chemical mechanism (CM)-based substrates are the biggest obstacles to their applications. Herein, we report that quasi-metallic VO2 nanosheet arrays can be used as a sensitive and stable SERS substrate. The lowest detectable limit of analyte adsorbed on the VO2 nanosheets achieves 10−10 M and the maximum Raman enhancement factor (EF) reaches 6.7 × 107, which is comparable with that of the noble metals. The experimental and theoretical results demonstrate that the SERS performance of the VO2 nanosheets comes from the strong interfacial interactions based on charge transfer and the vigorous SPR effects. Our research results demonstrate that quasi-metals are very promising SERS detection platforms and reveal that CM, like EM, contributes significantly to the SERS activity of quasi-metals. Published version 2020-06-15T01:13:54Z 2020-06-15T01:13:54Z 2019 Journal Article Tian, Z., Bai, H., Chen, C., Ye, Y., Kong, Q., Li, Y., . . . Xi, G. (2019). Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering. iScience, 19, 836-849. doi:10.1016/j.isci.2019.08.040 2589-0042 https://hdl.handle.net/10356/141993 10.1016/j.isci.2019.08.040 31505331 2-s2.0-85071882770 19 836 849 en iScience © 2019 The Author(s). Published under Cell Press. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
Physical Chemistry
Electromagnetics
spellingShingle Engineering::Materials
Physical Chemistry
Electromagnetics
Tian, Zheng
Bai, Hua
Chen, Chao
Ye, Yuting
Kong, Qinghong
Li, Yahui
Fan, Wenhao
Yi, Wencai
Xi, Guangcheng
Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
description Compared with the noble-metal surface-enhanced Raman scattering (SERS) substrates activated by the surface plasmon resonance (SPR)-induced electromagnetic mechanism (EM), the relative low sensitivity and stability of the chemical mechanism (CM)-based substrates are the biggest obstacles to their applications. Herein, we report that quasi-metallic VO2 nanosheet arrays can be used as a sensitive and stable SERS substrate. The lowest detectable limit of analyte adsorbed on the VO2 nanosheets achieves 10−10 M and the maximum Raman enhancement factor (EF) reaches 6.7 × 107, which is comparable with that of the noble metals. The experimental and theoretical results demonstrate that the SERS performance of the VO2 nanosheets comes from the strong interfacial interactions based on charge transfer and the vigorous SPR effects. Our research results demonstrate that quasi-metals are very promising SERS detection platforms and reveal that CM, like EM, contributes significantly to the SERS activity of quasi-metals.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Tian, Zheng
Bai, Hua
Chen, Chao
Ye, Yuting
Kong, Qinghong
Li, Yahui
Fan, Wenhao
Yi, Wencai
Xi, Guangcheng
format Article
author Tian, Zheng
Bai, Hua
Chen, Chao
Ye, Yuting
Kong, Qinghong
Li, Yahui
Fan, Wenhao
Yi, Wencai
Xi, Guangcheng
author_sort Tian, Zheng
title Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
title_short Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
title_full Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
title_fullStr Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
title_full_unstemmed Quasi-metal for highly sensitive and stable surface-enhanced Raman scattering
title_sort quasi-metal for highly sensitive and stable surface-enhanced raman scattering
publishDate 2020
url https://hdl.handle.net/10356/141993
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