Effects of quantum tunneling in metal nanogap on surface-enhanced Raman scattering

被引：79

作者：

Mao, Li ^{[1
]}

Li, Zhipeng ^{[1
]}

Wu, Biao ^{[1
]}

Xu, Hongxing ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 24期

关键词：

density functional theory; nanoparticles; numerical analysis; silver; surface enhanced Raman scattering; tunnelling; NANOSCALE OPTICAL BIOSENSOR; RANGE DISTANCE DEPENDENCE; PLASMON RESONANCE; AG NANOPARTICLES; SPECTROSCOPY; MOLECULES; DENSITY; SYSTEMS; SPHERES; FIELD;

D O I：

10.1063/1.3155157

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The quantum tunneling effects between two silver plates are studied using the time dependent density functional theory. Our results show that the tunneling depends mainly on the separation and the initial local field of the interstice between plates. The smaller separation and larger local field, the easier the electrons tunnels through the interstice. Our numerical calculation shows that when the separation is smaller than 0.6 nm the quantum tunneling dramatically reduces the enhancing ability of interstice between nanoparticles.

引用

页数：3

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