Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants

We report a new strategy for the fabrication of Ag–Au bimetallic nanowire (NW) arrays by taking advantage of interfacial assembly of plasmonic nanoparticles and galvanic replacement reactions. Galvanic replacement reactions led to the formation of nanospikes on NWs, giving rise to a high density of...

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Main Authors: Duan, Bo, Hou, Shuai, Wang, Peng, Chen, Yonghao, Xiong, Qirong, Das, Paramita, Duan, Hongwei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/159513
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1595132022-06-27T02:44:07Z Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants Duan, Bo Hou, Shuai Wang, Peng Chen, Yonghao Xiong, Qirong Das, Paramita Duan, Hongwei School of Chemical and Biomedical Engineering Engineering::Chemical engineering Bimetallic Nanowires Food Contaminants We report a new strategy for the fabrication of Ag–Au bimetallic nanowire (NW) arrays by taking advantage of interfacial assembly of plasmonic nanoparticles and galvanic replacement reactions. Galvanic replacement reactions led to the formation of nanospikes on NWs, giving rise to a high density of hotspots across the entire NW array. We employed this NW array as a surface-enhanced Raman scattering (surface-enhanced Raman spectroscopy [SERS]) substrate for the detection of two types of food contaminants: thiram (a pesticide) and melamine (an adulterant). Limits of detection (LODs) of 1 and 10 nM were achieved for thiram in juice samples and melamine in milk samples, respectively. Both LODs are lower than the maximum acceptable concentrations imposed by the US government. The results demonstrate tremendous practical potential of Ag–Au NW arrays as surface-enhanced Raman scattering substrates for the detection of food contaminants. Ministry of Education (MOE) The authors thank the Ministry of Education, Singaporefor financial supports (MOE2015-T2-1-112 and MOE2018-T2-2-128). 2022-06-27T02:44:07Z 2022-06-27T02:44:07Z 2021 Journal Article Duan, B., Hou, S., Wang, P., Chen, Y., Xiong, Q., Das, P. & Duan, H. (2021). Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants. Journal of Raman Spectroscopy, 52(2), 532-540. https://dx.doi.org/10.1002/jrs.6015 0377-0486 https://hdl.handle.net/10356/159513 10.1002/jrs.6015 2-s2.0-85096805626 2 52 532 540 en MOE2015-T2-1-112 MOE2018-T2-2-128 Journal of Raman Spectroscopy © 2020 John Wiley & Sons, Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Chemical engineering
Bimetallic Nanowires
Food Contaminants
spellingShingle Engineering::Chemical engineering
Bimetallic Nanowires
Food Contaminants
Duan, Bo
Hou, Shuai
Wang, Peng
Chen, Yonghao
Xiong, Qirong
Das, Paramita
Duan, Hongwei
Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
description We report a new strategy for the fabrication of Ag–Au bimetallic nanowire (NW) arrays by taking advantage of interfacial assembly of plasmonic nanoparticles and galvanic replacement reactions. Galvanic replacement reactions led to the formation of nanospikes on NWs, giving rise to a high density of hotspots across the entire NW array. We employed this NW array as a surface-enhanced Raman scattering (surface-enhanced Raman spectroscopy [SERS]) substrate for the detection of two types of food contaminants: thiram (a pesticide) and melamine (an adulterant). Limits of detection (LODs) of 1 and 10 nM were achieved for thiram in juice samples and melamine in milk samples, respectively. Both LODs are lower than the maximum acceptable concentrations imposed by the US government. The results demonstrate tremendous practical potential of Ag–Au NW arrays as surface-enhanced Raman scattering substrates for the detection of food contaminants.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Duan, Bo
Hou, Shuai
Wang, Peng
Chen, Yonghao
Xiong, Qirong
Das, Paramita
Duan, Hongwei
format Article
author Duan, Bo
Hou, Shuai
Wang, Peng
Chen, Yonghao
Xiong, Qirong
Das, Paramita
Duan, Hongwei
author_sort Duan, Bo
title Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
title_short Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
title_full Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
title_fullStr Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
title_full_unstemmed Chemical processing of interfacially assembled metal nanowires for surface-enhanced Raman scattering detection of food contaminants
title_sort chemical processing of interfacially assembled metal nanowires for surface-enhanced raman scattering detection of food contaminants
publishDate 2022
url https://hdl.handle.net/10356/159513
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