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    An Ordered AgNWs@GO-AgNPs Film as the Sensitive, Stable and Multifunctional Surface-Enhanced Raman Scattering Substrate

    Year: 2017

    Journal: J. Electrochem. Soc., Volume 164

    Authors: Li, Juan; Kong, Dewang; Xie, Anjian; Huang, Yiping; Huang, Fangzhi; Li, Shikuo; Shen, Yuhua

    Organizations: National Nature Science Foundation of China [21671001, 21371003, 51372004]; Anhui Province Key Laboratory of Environment-Friendly Polymer Materials

    The ordered monolayer graphene oxide (GO)-shielded Ag nanowire (AgNW) film was used as a large-area uniform and long-term stable surface-enhanced Raman scattering (SERS) substrate, while the Ag nanoparticles (AgNPs) decorated on the outside surface of GO layers can increase the roughness of the film for providing more SERS active sites. What's more, as a subnanometer spacer, GO created a uniform nanogap between AgNPs and AgNWs that can form more hot spots in the nanocomposite film. By virtue of these advantages, the AgNWs@GO-AgNPs composite film exhibits a highly sensitive SERS measure with a detection limit of rhodamine 6G (R6G) as low as 10(-13) M. Besides, we also investigated the catalytic activity of the AgNWs@GO-AgNPs composite film for the reduction of 4-nitrophenol (4-NP) as a probe reaction. (c) 2017 The Electrochemical Society. All rights reserved.
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