title: 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 10-15M. 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.
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Li
authors.affiliation: Shandong Provincial Key Laboratory of Biophysics, College of Physics and Electronic Information, Dezhou University, Dezhou 253023, PR China.
authors.forename: Shi Cai
authors.initials: SC
authors.lastname: Xu
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Xiao Yun
authors.initials: XY
authors.lastname: Liu
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Sai Sai
authors.initials: SS
authors.lastname: Gao
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Li Tao
authors.initials: LT
authors.lastname: Hu
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Guo
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Ma
authors.affiliation: School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.
authors.forename: Shou Zhen
authors.initials: SZ
authors.lastname: Jiang
authors.affiliation: Department of Orthopaedics, Qilu Hospital, Shandong University, 107 wenhuaxilu Street, Jinan 250012, China.
authors.forename: Hai Peng
authors.initials: HP
authors.lastname: Si