Photoreduction of Silver Salts Using Au Nanoparticles to Form a Core-Shell-Type Nanostructure: Insight into the Reaction Mechanism |
| |
Authors: | Chen Xiaojuan Wen Rui Zhang Lisheng Lahiri Abhishek Wang Peijie Fang Yan |
| |
Affiliation: | 1.The Beijing Key Laboratory for Nano-Photonics and Nano-Structure, Department of Physics, Capital Normal University, 100048, Beijing, China ;2.Institute of Electrochemistry, Clausthal University of Technology, Arnold-Sommerfeld-Str. 6, 38678, Clausthal-Zellerfeld, Germany ; |
| |
Abstract: | In this paper, we highlight the formation of Ag/Au core-shell nanoparticles at room temperature by using a low-power laser. We have investigated the plasmon-induced reduction of Ag+ ions on bare Au nanoparticles synthesized by laser ablation technique, and citrate-capped Au nanoparticles synthesized by chemical method. It is demonstrated that citrate plays an important role for the reduction of silver ions. The citrate gets oxidized by the ‘hot’ holes produced due to the surface plasmon resonance (SPR) of the Au nanoparticles which then reduces the Ag+ ions to Ag. The importance of excitation laser wavelength is also demonstrated to facilitate the reduction process. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|