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Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate

Surface enhanced Raman scattering (SERS) substrate based on fabricated Ag@Au core-shell dendrite was achieved. Ag dendrites were grown on Si wafer by the hydrothermal corrosion method and Au nanofilm on the surface of Ag dendritic nanostructure was then fabricated by chemical reduction. With the hel...

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Autores principales: Jun Yin, Hong, Yang Chen, Zhao, Mei Zhao, Yong, Yang Lv, Ming, An Shi, Chun, Long Wu, Zheng, Zhang, Xin, Liu, Luo, Li Wang, Ming, Jun Xu, Hai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4585979/
https://www.ncbi.nlm.nih.gov/pubmed/26412773
http://dx.doi.org/10.1038/srep14502
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author Jun Yin, Hong
Yang Chen, Zhao
Mei Zhao, Yong
Yang Lv, Ming
An Shi, Chun
Long Wu, Zheng
Zhang, Xin
Liu, Luo
Li Wang, Ming
Jun Xu, Hai
author_facet Jun Yin, Hong
Yang Chen, Zhao
Mei Zhao, Yong
Yang Lv, Ming
An Shi, Chun
Long Wu, Zheng
Zhang, Xin
Liu, Luo
Li Wang, Ming
Jun Xu, Hai
author_sort Jun Yin, Hong
collection PubMed
description Surface enhanced Raman scattering (SERS) substrate based on fabricated Ag@Au core-shell dendrite was achieved. Ag dendrites were grown on Si wafer by the hydrothermal corrosion method and Au nanofilm on the surface of Ag dendritic nanostructure was then fabricated by chemical reduction. With the help of sodium borohydride in water, Au surface absorbates such as thiophene, adenine, rhodamine, small anions (Br(–) and I(–)), and a polymer (PVP, poly(N-vinylpyrrolidone)) can be completely and rapidly removed. After four repeatable experiments, the substrate SERS function did not decrease at all, indicating that the Ag@Au dendrite should be of great significance to SERS application because it can save much resource. Six-month-duration stability tests showed that the Ag@Au core-shell dendrite substrate is much more stable than the Ag dendrite substrates. We have also experimented on fast detection of Cd(2+) at 10(−8)  M concentration by decorating single-stranded DNA containing adenine and guanine bases on the surface of this Ag@Au dendrite. Finite-difference time-domain simulations were carried out to investigate the influence of Au nanolayer on Ag dendrites, which showed that the local electric fields and enhancement factor are hardly affected when a 4 nm Au nanolayer is coated on Ag dendrite surface.
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spelling pubmed-45859792015-09-30 Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate Jun Yin, Hong Yang Chen, Zhao Mei Zhao, Yong Yang Lv, Ming An Shi, Chun Long Wu, Zheng Zhang, Xin Liu, Luo Li Wang, Ming Jun Xu, Hai Sci Rep Article Surface enhanced Raman scattering (SERS) substrate based on fabricated Ag@Au core-shell dendrite was achieved. Ag dendrites were grown on Si wafer by the hydrothermal corrosion method and Au nanofilm on the surface of Ag dendritic nanostructure was then fabricated by chemical reduction. With the help of sodium borohydride in water, Au surface absorbates such as thiophene, adenine, rhodamine, small anions (Br(–) and I(–)), and a polymer (PVP, poly(N-vinylpyrrolidone)) can be completely and rapidly removed. After four repeatable experiments, the substrate SERS function did not decrease at all, indicating that the Ag@Au dendrite should be of great significance to SERS application because it can save much resource. Six-month-duration stability tests showed that the Ag@Au core-shell dendrite substrate is much more stable than the Ag dendrite substrates. We have also experimented on fast detection of Cd(2+) at 10(−8)  M concentration by decorating single-stranded DNA containing adenine and guanine bases on the surface of this Ag@Au dendrite. Finite-difference time-domain simulations were carried out to investigate the influence of Au nanolayer on Ag dendrites, which showed that the local electric fields and enhancement factor are hardly affected when a 4 nm Au nanolayer is coated on Ag dendrite surface. Nature Publishing Group 2015-09-28 /pmc/articles/PMC4585979/ /pubmed/26412773 http://dx.doi.org/10.1038/srep14502 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Jun Yin, Hong
Yang Chen, Zhao
Mei Zhao, Yong
Yang Lv, Ming
An Shi, Chun
Long Wu, Zheng
Zhang, Xin
Liu, Luo
Li Wang, Ming
Jun Xu, Hai
Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title_full Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title_fullStr Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title_full_unstemmed Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title_short Ag@Au core-shell dendrites: a stable, reusable and sensitive surface enhanced Raman scattering substrate
title_sort ag@au core-shell dendrites: a stable, reusable and sensitive surface enhanced raman scattering substrate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4585979/
https://www.ncbi.nlm.nih.gov/pubmed/26412773
http://dx.doi.org/10.1038/srep14502
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