title: Graphene Oxide-Supported Ag Nanoplates as LSPR Tunable and Reproducible Substrates for SERS Applications with Optimized Sensitivity.
abstract: Nanoparticles and nanohybrids with well-defined structures, along with tunable localized surface plasmon resonance (LSPR) properties and optimized sensitivity, are crucial and highly desired for surface-enhanced Raman spectroscopy (SERS) applications. In this article, we report on a very promising and flexible SERS platforms with a tunable LSPR response and sensitivity based on Ag nanoplates and graphene oxide (GO). The SERS detection sensitivity can be easily optimized and significantly improved by fine-tuning the LSPR band of the Ag nanoplate/GO substrates (to enhance the SERS response) during sample preparation. We applied the as-prepared SERS platform for sensitive SERS detection of 4-mercaptobenzoic acid and 4-aminothiophenol and found that the SERS signal varied markedly (by ∼10-15-fold) with the fine-tuning of the LSPR band. The SERS enhancement factor of the Ag nanoplate/GO complexes was more than 10(4) times larger than that obtained using spherical Ag nanoparticles. The as-prepared Ag nanoplate/GO platforms, because of their excellent stability and tunable LSPR properties, will find promising practical SERS applications.
authors.affiliation: †State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.|‡University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Hou
authors.affiliation: †State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.affiliation: †State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.|‡University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.affiliation: †State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.|‡University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
authors.forename: Chuanping
authors.initials: C
authors.lastname: Li
authors.affiliation: †State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China.
authors.forename: Yongdong
authors.initials: Y
authors.lastname: Jin
keywords: Ag nanoplates; graphene oxide; localized surface plasmon resonance; reproducibility; sensitivity; surface-enhanced Raman spectroscopy