Attenuation of surface-enhanced Raman spectroscopy response in gold-platinum core-shell nanoparticles

被引：30

作者：

Flynn, NT

Gewirth, AA

机构：

[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2002年 / 33卷 / 04期

关键词：

D O I：

10.1002/jrs.841

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Colloidal gold particles (11.2 nm) were coated with platinum overlayers, resulting in bimetallic particles with 1-8 mol% Pt. These particles were characterized using electron microscopy, energy-dispersive x-ray spectroscopy and electrochemistry confirming the Au-Pt core-shell structure. The UV-visible spectra showed only minimal red shifts with increasing Pt content. The Raman spectra, on the other hand, changed dramatically with slight increases in Pt, resulting in a loss of appreciable surface-enhancement effects by 4 mol% Pt. Copyright (C) 2002 John Wiley Sons, Ltd.

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页码：243 / 251

页数：9

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