Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate

A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO(2)@Ag NPs) was prepared as a surface-enhanced Raman scattering (SERS) substrate. A 6 nm layer of silica was successfully coated on the surface of GO by the physical adsorption of sodium silicate, followed by the hydr...

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Autores principales: Pham, Xuan-Hung, Hahm, Eunil, Kim, Hyung-Mo, Shim, Seongbo, Kim, Tae Han, Jeong, Dae Hong, Lee, Yoon-Sik, Jun, Bong-Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5245191/
https://www.ncbi.nlm.nih.gov/pubmed/28335304
http://dx.doi.org/10.3390/nano6100176
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author Pham, Xuan-Hung
Hahm, Eunil
Kim, Hyung-Mo
Shim, Seongbo
Kim, Tae Han
Jeong, Dae Hong
Lee, Yoon-Sik
Jun, Bong-Hyun
author_facet Pham, Xuan-Hung
Hahm, Eunil
Kim, Hyung-Mo
Shim, Seongbo
Kim, Tae Han
Jeong, Dae Hong
Lee, Yoon-Sik
Jun, Bong-Hyun
author_sort Pham, Xuan-Hung
collection PubMed
description A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO(2)@Ag NPs) was prepared as a surface-enhanced Raman scattering (SERS) substrate. A 6 nm layer of silica was successfully coated on the surface of GO by the physical adsorption of sodium silicate, followed by the hydrolysis of 3-mercaptopropyl trimethoxysilane. Ag NPs were introduced onto the thin silica-coated graphene oxide by the reduction of Ag(+) to prepare GO@SiO(2)@Ag NPs. The GO@SiO(2)@Ag NPs exhibited a 1.8-fold enhanced Raman signal compared to GO without a silica coating. The GO@SiO(2)@Ag NPs showed a detection limit of 4-mercaptobenzoic acid (4-MBA) at 0.74 μM.
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spelling pubmed-52451912017-03-21 Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate Pham, Xuan-Hung Hahm, Eunil Kim, Hyung-Mo Shim, Seongbo Kim, Tae Han Jeong, Dae Hong Lee, Yoon-Sik Jun, Bong-Hyun Nanomaterials (Basel) Article A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO(2)@Ag NPs) was prepared as a surface-enhanced Raman scattering (SERS) substrate. A 6 nm layer of silica was successfully coated on the surface of GO by the physical adsorption of sodium silicate, followed by the hydrolysis of 3-mercaptopropyl trimethoxysilane. Ag NPs were introduced onto the thin silica-coated graphene oxide by the reduction of Ag(+) to prepare GO@SiO(2)@Ag NPs. The GO@SiO(2)@Ag NPs exhibited a 1.8-fold enhanced Raman signal compared to GO without a silica coating. The GO@SiO(2)@Ag NPs showed a detection limit of 4-mercaptobenzoic acid (4-MBA) at 0.74 μM. MDPI 2016-09-22 /pmc/articles/PMC5245191/ /pubmed/28335304 http://dx.doi.org/10.3390/nano6100176 Text en © 2016 by the authors; 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pham, Xuan-Hung
Hahm, Eunil
Kim, Hyung-Mo
Shim, Seongbo
Kim, Tae Han
Jeong, Dae Hong
Lee, Yoon-Sik
Jun, Bong-Hyun
Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title_full Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title_fullStr Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title_full_unstemmed Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title_short Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate
title_sort silver nanoparticle-embedded thin silica-coated graphene oxide as an sers substrate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5245191/
https://www.ncbi.nlm.nih.gov/pubmed/28335304
http://dx.doi.org/10.3390/nano6100176
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