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High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si.

ABSTRACT: We present a novel surface-enhanced Raman scattering (SERS) substrate based on graphene oxide/silver nanoparticles/copper film covered silicon pyramid arrays (GO/AgNPs/PCu@Si) by a low-cost and simple method. The GO/AgNPs/PCu@Si substrate presents high sensitivity, good homogeneity and well stability with R6G molecules as a probe. The detected concentration of Rhodamine 6?G (R6G) is as low as 10^-15 M. These sensitive SERS behaviors are also confirmed in theory via a commercial COMSOL software, the electric field enhancement is not only formed between the AgNPs, but also formed between the AgNPs and Cu film. And the GO/AgNPs/PCu@Si substrates also present good property on practical application for the detection of methylene blue (MB) and crystal violet (CV). This work may offer a novel and practical method to facilitate the SERS applications in areas of medicine, food safety and biotechnology.

SUBMITTER: Li Z

PROVIDER: S-EPMC5141445 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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High-performance SERS substrate based on hybrid structure of graphene oxide/AgNPs/Cu film@pyramid Si.

Li Zhe Z Xu Shi Cai SC Zhang Chao C Liu Xiao Yun XY Gao Sai Sai SS Hu Li Tao LT Guo Jia J Ma Yong Y Jiang Shou Zhen SZ Si Hai Peng HP

Scientific reports 20161207

We present a novel surface-enhanced Raman scattering (SERS) substrate based on graphene oxide/silver nanoparticles/copper film covered silicon pyramid arrays (GO/AgNPs/PCu@Si) by a low-cost and simple method. The GO/AgNPs/PCu@Si substrate presents high sensitivity, good homogeneity and well stability with R6G molecules as a probe. The detected concentration of Rhodamine 6 G (R6G) is as low as 10<sup>-15</sup> M. These sensitive SERS behaviors are also confirmed in theory via a commercial COMSOL ...[more]

PMID: 27924863

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