title: Gold nanoparticles assembling on smooth silver spheres for surface-enhanced Raman spectroscopy.
abstract: A simple and cost-effective chemical method was introduced to assemble gold (Au) nanoparticles on smooth silver (Ag) spheres for realizing surface-enhanced Raman scattering (SERS) enhancement by the replacement reaction between chloroauric acid and Ag spheres. In addition, the Ag-Au core-shell spheres were fabricated when a certain amount of chloroauric acid was used in the reaction solution. We found that the Ag particles decorated with small Au nanoparticles demonstrated the strongest SERS enhancement, while Ag-Au core-shell spheres showed the weakest enhancement.
authors.affiliation: Department of Physics and State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Xia
authors.forename: Jian
authors.initials: J
authors.lastname: Sha
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Fang
authors.forename: Ren
authors.initials: R
authors.lastname: Lu
authors.forename: Yafei
authors.initials: Y
authors.lastname: Luo
authors.forename: Yewu
authors.initials: Y
authors.lastname: Wang