Abstract
By using Au nanoparticles with a diameter of 55 nm as the core and ascorbic acid as the reductant, Aucore@ Ptshell nanoparticles of controllable Pt shell thickness( 0. 3 ～ 6 nm) were synthesized by controlling the concentration of [PtCl6]2 - ions. The ultraviolet-visible absorption spectrometry,scanning electron microscope ( SEM) ,transmission electron microscope ( TEM) ,high resolution transmission electron microscope ( HRTEM) , and electrochemical cyclic voltammetry were employed to determine surface morphology and structure of Aucore@ Ptshell. With SCN - ion as a probe,the effect of the thickness of the Pt shell on the SERS signals of Aucore@ Ptshell nanoparticles was investigated. It was found that the intensities of SERS signals decreased exponentially with the increase of Pt shell thickness. The result revealed that at a shell thickness of 1. 4 nm,the core-shell nanoparticles present the chemical property of the Pt shell and having a large SERS activity.
Keywords
Au@ Pt nanoparticles, controllable preparation, SERS activity
Publication Date
2010-08-28
Online Available Date
2010-08-28
Revised Date
2010-08-28
Received Date
2010-08-28
Recommended Citation
Yan ZHONG, Liang-liang YAN, Gui-shi RAO, Xiao-cong DENG, Fei-peng WEN, Jin-long XU, Qi-ling ZHONG.
The SERS Effect of Au_(core)@Pt_(shell) Nanoparticles with Different Pt Shell Thicknesses[J]. Journal of Electrochemistry,
2010
,
16(3): 300-304.
DOI: 10.61558/2993-074X.2053
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol16/iss3/1
