Remarkable SERS Activity Observed from Amorphous ZnO Nanocages

Enhancement of the semiconductor–molecule interaction, in particular, promoting the interfacial charge transfer process (ICTP), is key to improving the sensitivity of semiconductor‐based surface enhanced Raman scattering (SERS). Herein, by developing amorphous ZnO nanocages (a‐ZnO NCs), we successfu...

Full description

Saved in:
Bibliographic Details
Main Authors: Wang, Xiaotian, Shi, Wenxiong, Huang, Weifeng, Lin, Jie, Ma, Guanshui, Li, Shuzhou, Guo, Lin, Jin, Zhao
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2018
Subjects:
Online Access:https://hdl.handle.net/10356/88919
http://hdl.handle.net/10220/44787
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-88919
record_format dspace
spelling sg-ntu-dr.10356-889192023-07-14T15:50:19Z Remarkable SERS Activity Observed from Amorphous ZnO Nanocages Wang, Xiaotian Shi, Wenxiong Huang, Weifeng Lin, Jie Ma, Guanshui Li, Shuzhou Guo, Lin Jin, Zhao School of Materials Science & Engineering Amorphous ZnO Nanocages Chemical Enhancement Enhancement of the semiconductor–molecule interaction, in particular, promoting the interfacial charge transfer process (ICTP), is key to improving the sensitivity of semiconductor‐based surface enhanced Raman scattering (SERS). Herein, by developing amorphous ZnO nanocages (a‐ZnO NCs), we successfully obtained an ultrahigh enhancement factor of up to 6.62×105. This remarkable SERS sensitivity can be attributed to high‐efficiency ICTP within a‐ZnO NC molecule system, which is caused by metastable electronic states of a‐ZnO NCs. First‐principles density functional theory (DFT) simulations further confirmed a stronger ICTP in a‐ZnO NCs than in their crystalline counterparts. The efficient ICTP can even generate π bonding in Zn−S bonds peculiar to the mercapto molecule adsorbed a‐ZnO NCs, which has been verified through the X‐ray absorption near‐edge structure (XANES) characterization. To the best of our knowledge, this is the first time such remarkable SERS activity has been observed within amorphous semiconductor nanomaterials, which could open a new frontier for developing highly sensitive and stable SERS technology. MOE (Min. of Education, S’pore) Accepted version 2018-05-15T03:30:15Z 2019-12-06T17:13:45Z 2018-05-15T03:30:15Z 2019-12-06T17:13:45Z 2017 2017 Journal Article Wang, X., Shi, W., Jin, Z., Huang, W., Lin, J., Ma, G., et al. (2017). Remarkable SERS Activity Observed from Amorphous ZnO Nanocages. Angewandte Chemie International Edition, 56(33), 9851-9855. 1433-7851 https://hdl.handle.net/10356/88919 http://hdl.handle.net/10220/44787 10.1002/anie.201705187 207237 en Angewandte Chemie International Edition © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Angewandte Chemie International Edition, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1002/anie.201705187]. 20 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Amorphous ZnO Nanocages
Chemical Enhancement
spellingShingle Amorphous ZnO Nanocages
Chemical Enhancement
Wang, Xiaotian
Shi, Wenxiong
Huang, Weifeng
Lin, Jie
Ma, Guanshui
Li, Shuzhou
Guo, Lin
Jin, Zhao
Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
description Enhancement of the semiconductor–molecule interaction, in particular, promoting the interfacial charge transfer process (ICTP), is key to improving the sensitivity of semiconductor‐based surface enhanced Raman scattering (SERS). Herein, by developing amorphous ZnO nanocages (a‐ZnO NCs), we successfully obtained an ultrahigh enhancement factor of up to 6.62×105. This remarkable SERS sensitivity can be attributed to high‐efficiency ICTP within a‐ZnO NC molecule system, which is caused by metastable electronic states of a‐ZnO NCs. First‐principles density functional theory (DFT) simulations further confirmed a stronger ICTP in a‐ZnO NCs than in their crystalline counterparts. The efficient ICTP can even generate π bonding in Zn−S bonds peculiar to the mercapto molecule adsorbed a‐ZnO NCs, which has been verified through the X‐ray absorption near‐edge structure (XANES) characterization. To the best of our knowledge, this is the first time such remarkable SERS activity has been observed within amorphous semiconductor nanomaterials, which could open a new frontier for developing highly sensitive and stable SERS technology.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Wang, Xiaotian
Shi, Wenxiong
Huang, Weifeng
Lin, Jie
Ma, Guanshui
Li, Shuzhou
Guo, Lin
Jin, Zhao
format Article
author Wang, Xiaotian
Shi, Wenxiong
Huang, Weifeng
Lin, Jie
Ma, Guanshui
Li, Shuzhou
Guo, Lin
Jin, Zhao
author_sort Wang, Xiaotian
title Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
title_short Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
title_full Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
title_fullStr Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
title_full_unstemmed Remarkable SERS Activity Observed from Amorphous ZnO Nanocages
title_sort remarkable sers activity observed from amorphous zno nanocages
publishDate 2018
url https://hdl.handle.net/10356/88919
http://hdl.handle.net/10220/44787
_version_ 1772828882075910144