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Nanomaterials 2016, 6(10), 176; doi:10.3390/nano6100176

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

Department of Bioscience and Biotechnology, Konkuk University, Seoul 143-701, Korea
Department of Chemistry Education, Seoul National University, Seoul 151-742, Korea
School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea
Author to whom correspondence should be addressed.
Academic Editor: Yuan Chen
Received: 13 June 2016 / Revised: 6 September 2016 / Accepted: 6 September 2016 / Published: 22 September 2016
(This article belongs to the Special Issue 2D Nanomaterials: Graphene and Beyond Graphene)
View Full-Text   |   Download PDF [1769 KB, uploaded 22 September 2016]   |  


A hybrid of Ag nanoparticle (NP)-embedded thin silica-coated graphene oxide (GO@SiO2@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@SiO2@Ag NPs. The GO@SiO2@Ag NPs exhibited a 1.8-fold enhanced Raman signal compared to GO without a silica coating. The GO@SiO2@Ag NPs showed a detection limit of 4-mercaptobenzoic acid (4-MBA) at 0.74 μM. View Full-Text
Keywords: graphene oxide; silica coating; surface-enhanced Raman scattering (SERS); signal enhancement graphene oxide; silica coating; surface-enhanced Raman scattering (SERS); signal enhancement

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pham, X.-H.; Hahm, E.; Kim, H.-M.; Shim, S.; Kim, T.H.; Jeong, D.H.; Lee, Y.-S.; Jun, B.-H. Silver Nanoparticle-Embedded Thin Silica-Coated Graphene Oxide as an SERS Substrate. Nanomaterials 2016, 6, 176.

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