Studies on the promotion effect of SERS activities of gold nanoparticles by the silver shell

Article type: Research Article

Authors: Li, Xiaodong^{; *} | Jin, Shi

Affiliations: Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun, China

Correspondence: [*] Corresponding author: Xiaodong Li, Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China. E-mail: lxdjlju@163.com.

Abstract:  In this work, the authors developed a method to promote the SERS activities of gold nanoparticles by deposition of thin silver shell on their surfaces. Spherical gold nanoparticles were used as the model, and a chemical reduction process was carried out to deposition silver shells on the surface of gold nanoparticles (in the form of Au@Ag). The shell thickness can be adjusted by tuning the molar ratio of MAg/MAu, and the optimized the SERS activities by using rhodamine 6G as the probing molecules. The relationship between SERS activity of Au@Ag and shell thickness was studied.

Keywords: Gold nanoparticles, silver shell, core-shell nanoparticles, SERS activity

DOI: 10.3233/MGC-190806

Journal: Main Group Chemistry, vol. 18, no. 4, pp. 477-483, 2019