不同Pt壳厚度Au_(core)@Pt_(shell)纳米粒子SERS效应

doi:10.61558/2993-074X.2053

电化学（中英文） ›› 2010, Vol. 16 ›› Issue (3): 300-304. doi: 10.61558/2993-074X.2053

不同Pt壳厚度Au_(core)@Pt_(shell)纳米粒子SERS效应

钟艳;颜亮亮;饶贵仕;邓小聪;温飞鹏;徐金龙;钟起玲;

江西师范大学化学化工学院;

收稿日期:2010-08-28 修回日期:2010-08-28 出版日期:2010-08-28 发布日期:2010-08-28

The SERS Effect of Au_(core)@Pt_(shell) Nanoparticles with Different Pt Shell Thicknesses

ZHONG Yan,YAN Liang-liang,RAO Gui-shi,DENG Xiao-cong, WEN Fei-peng,XU Jin-long,ZHONG Qi-ling*

( Department of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang 330022,China

Received:2010-08-28 Revised:2010-08-28 Published:2010-08-28 Online:2010-08-28

摘要/Abstract

摘要： 以Au粒子(55nm)为核,抗坏血酸为还原剂,将不同量的Pt沉积在Au核上,制得可控壳层厚度(0.3～6nm)的Pt包Au纳米粒子(Aucore@Ptshell).用紫外-可见吸收光谱、扫描电镜(SEM)、透射电镜(TEM)和电化学循环伏安法等观测Aucore@Ptshell纳米粒子的表面形貌、结构和性能.另以SCN-为探针,考察了Pt壳厚度对Aucore@Ptshell纳米粒子SERS信号的影响.结果表明,SCN-离子的SERS信号强度随Pt壳厚度的增加呈指数衰减,当Pt壳厚度为1.4nm时,Aucore@Ptshel纳米粒子表现出铂良好的电化学性能,又具有较强的SERS活性.

关键词: 铂包金纳米粒子, 可控制备, SERS活性

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.

Key words: Au@ Pt nanoparticles, controllable preparation, SERS activity

中图分类号:

O646

钟艳, 颜亮亮, 饶贵仕, 邓小聪, 温飞鹏, 徐金龙, 钟起玲, . 不同Pt壳厚度Au_(core)@Pt_(shell)纳米粒子SERS效应[J]. 电化学（中英文）, 2010, 16(3): 300-304.

ZHONG Yan, YAN Liang-liang, RAO Gui-shi, DENG Xiao-cong, WEN Fei-peng, XU Jin-long, ZHONG Qi-ling . The SERS Effect of Au_(core)@Pt_(shell) Nanoparticles with Different Pt Shell Thicknesses[J]. Journal of Electrochemistry, 2010, 16(3): 300-304.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2053

https://electrochem.xmu.edu.cn/CN/Y2010/V16/I3/300

参考文献

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不同Pt壳厚度Au_(core)@Pt_(shell)纳米粒子SERS效应

The SERS Effect of Au_(core)@Pt_(shell) Nanoparticles with Different Pt Shell Thicknesses

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