Geometric effect on surface enhanced Raman scattering of nanoporous gold: Improving Raman scattering by tailoring ligament and nanopore ratios

被引：77
作者：
Lang, X. Y. [1 ]
Chen, L. Y. [1 ]
Guan, P. F. [1 ]
Fujita, T. [1 ]
Chen, M. W. [1 ]
机构：
[1] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 21期
关键词：
electroplating; gold; metallic thin films; nanofabrication; nanoporous materials; surface enhanced Raman scattering; surface plasmons; OPTICAL-PROPERTIES; NANOPARTICLES; FILMS; SIZE; SPECTROSCOPY; DEPENDENCE;
D O I：
10.1063/1.3143628
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have synthesized nanoporous gold (NPG) films with a nanostructure consisting of small nanopores and large gold ligaments by the combination of chemical dealloying and electroless plating. The NPG films exhibit dramatic improvement in surface enhanced Raman scattering (SERS) in comparison with the conventional NPG. The superior SERS effect of the NPG films results from the confluence effect of enhanced local surface plasmon fields and electromagnetic coupling between ligaments, as well as the weak plasmon damping with increasing gold ligament sizes.
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页数：3
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