Synthesis of Au@Pd core-shell nanoparticles with controllable size and their application in surface-enhanced Raman spectroscopy

被引：116
作者：
Hu, JW
Zhang, Y
Li, JF
Liu, Z
Ren, B
Sun, SG
Tian, ZQ [1 ]
Lian, T
机构：
[1] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[2] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China
[3] Emory Univ, Dept Chem, Atlanta, GA 30322 USA
来源：
CHEMICAL PHYSICS LETTERS | 2005年 / 408卷 / 4-6期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.cplett.2005.04.071
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Au core Pd shell (Au@Pd) nanoparticles with controllable size from 35 to 100 nm were prepared by chemical deposition, of Pd over pre-formed 12 nm Au seeds. Both transmission electron microscopy and LTV-visible spectroscopy studies confirmed the coreshell structure of the synthesized nanoparticles. The Au@Pd nanoparticles dispersed on a polished Pt electrode surface exhibit high surface-enhanced Raman scattering (SERS) effect for the adsorbed pyridine and SCN-. With the aid of the long-range effect of the electromagnetic (EM) enhancement created by the SERS-active Au core underneath the Pd shell, the good quality SERS spectra of adsorbates on the palladium metal overlayer can be obtained. Such kind of SERS-active substrate can be used as an alternative substrate to massive metals for investigating adsorption and reactions occurring on the Pd metal catalyst. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：354 / 359
页数：6
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