Sandwich-structured Ag/graphene/Au hybrid for surface-enhanced Raman scattering

被引：51

作者：

Liu, Aiping ^{[1
,2
]}

Xu, Tao ^{[1
]}

Tang, Jian ^{[1
]}

Wu, Huaping ^{[3
]}

Zhao, Tingyu ^{[1
]}

Tang, Weihua ^{[4
]}

机构：

[1] Zhejiang Sci Tech Univ, Ctr Optoelect Mat & Devices, Hangzhou 310018, Peoples R China

[2] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China

[3] Zhejiang Univ Technol, Minist Educ & Zhejiang Prov, Key Lab E&M, Hangzhou 310032, Zhejiang, Peoples R China

[4] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 119卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Metallic plasmons; Reduced graphene oxide; Sandwich structure; Surface-enhanced Raman scattering; Electrochemical deposition; GRAPHENE OXIDE; SILVER NANOPARTICLES; NANOPLASMONIC RESONATOR; GRAPHITE OXIDE; SPECTROSCOPY; SUBSTRATE; SERS; FILMS; AU; AG;

D O I：

10.1016/j.electacta.2013.12.036

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The Ag/graphene/Au nanostructure as an efficient surface enhanced Raman scattering (SERS)-active substrate was fabricated by sandwiching the reduced graphene oxide (rGO) between plasmonic silver dendrites and gold nanoparticles layers by a simple electrodeposition method. The surface plasmons aroused in the Ag-rGO interface could be effectively transferred from the silver to the top gold by rGO interlayer, which favored the higher SERS activity of Ag/rGO/Au hybrid compared to the Ag/rGO and Au/rGO/Au ones due to the more localized plasmon resonance on the gold surface. Furthermore, the reduction degree of rGO interlayer impacted the nucleation and growth of gold on the rGO surface and therefore the Raman signal for Rhodamine B molecules absorbed on the Ag/rGO/Au sandwich nanostructure. The rGO sheets and the top gold nanoparticles film also effectively protected the silver dendrites from oxidation under ambient condition. This Ag/rGO/Au sandwich nanostructure was useful for the development of an efficient SERS-based chemical sensor because of the simply fabrication, adjustable SERS activity, long-term stability and high reproducibility. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：43 / 48

页数：6