Geometric effect on surface enhanced Raman scattering of nanoporous gold: Improving Raman scattering by tailoring ligament and nanopore ratios
Geometric effect on surface enhanced Raman scattering of nanoporous gold: Improving Raman scattering by tailoring ligament and nanopore ratios
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DOI：
10.1063/1.3143628
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发表时间：
2009-05-25
影响因子：
4
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Lang, X. Y.;Chen, L. Y.;Chen, M. W.
采用化学合金化和化学镀相结合的方法合成了由小纳米孔和大金韧带组成的纳米结构的纳米孔金薄膜。与传统的NPG相比，NPG薄膜在表面增强拉曼散射（SERS）方面表现出显著的改善。NPG膜优越的SERS效应是由于局部表面等离子体场增强和韧带之间的电磁耦合的汇合效应，以及随着金韧带尺寸的增加，等离子体阻尼减弱。
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.