title: Self-assembly of gold nanoparticles to silver microspheres as highly efficient 3D SERS substrates.
abstract: Herein we report a simple, one-pot, surfactant-free synthesis of 3D Ag microspheres (AgMSs) in aqueous phase at room temperature. The 3D AgMSs act as supports to fix the gold nanoparticles (GNPs) in 3D space via the interaction between the carboxyl groups of GNPs and the Ag atoms of AgMSs. The ensemble of AgMSs@GNPs with high surface-enhanced Raman scattering (SERS) activity and sensitivity can be an ideal 3D substrate choice for practical SERS detection applications. The simple self-assembly strategy may be extended to other metallic materials with great potentials in SERS, catalysis, and photoelectronic devices.
authors.affiliation: Department of Bio-Nano-Science and Engineering, National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro-Nano Science and Technology, Shanghai JiaoTong University, Shanghai, 200240, China. dxcui@sjtu.edu.cn.
authors.forename: Shouhui
authors.initials: S
authors.lastname: Chen
authors.forename: Peng
authors.initials: P
authors.lastname: Huang
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Wang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Wang
authors.forename: Magdalena
authors.initials: M
authors.lastname: Swierczewska
authors.forename: Gang
authors.initials: G
authors.lastname: Niu
authors.forename: Daxiang
authors.initials: D
authors.lastname: Cui
authors.forename: Xiaoyuan
authors.initials: X
authors.lastname: Chen