Anomalous infrared and visible light absorption and local structure of Ag–Au core/shell nanoparticles

被引：0
|
作者：
Y. Suzuki
M. Yamamoto
T. Saito
T. Miyanaga
S. Ohwada
A. Iwakoshi
T. Nanke
T. Kobayashi
机构：
[1] Hirosaki University,Department of Advanced Physics, Faculty of Science and Technology
[2] Nippon Paint Co. Ltd.,Innovative Technology Laboratory
来源：
Applied Physics A | 2011年 / 103卷
关键词：
Plasmon Resonance; Shell Thickness; Core Diameter; Visible Absorption Spectrum; Visible Light Absorption;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We measured infrared and visible light absorption spectra and EXAFS for Ag–Au core/shell particles. The shell thickness and core diameter can be evaluated from the EXAFS results, which are almost consistent with those obtained using TEM. The influence of a thinner shell only slightly appeared in the visible absorption spectra, whereas the influence appeared strongly in the infrared absorption spectra. The spectra of the material in the vicinity of the particle surface appear in the infrared spectra. On the other hand, the spectra of the rather more internal material are observed in the visible spectra. It is thought that the influence of the core metal is different in the visible spectra from the infrared spectra. By considering the penetration depth, this phenomenon can be explained.
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页码：81 / 88
页数：7
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