Effects of quantum tunneling in metal nanogap on surface-enhanced Raman scattering
Effects of quantum tunneling in metal nanogap on surface-enhanced Raman scattering
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DOI：
10.1063/1.3155157
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发表时间：
2009-06-15
影响因子：
4
通讯作者：
Xu, Hongxing
中科院分区：
文献类型：
--
作者：
Mao, Li;Li, Zhipeng;Xu, Hongxing
用含时密度泛函理论研究了银片间的量子隧道效应。结果表明，隧道效应主要取决于板间空隙的间距和初始局域场。间隔越小，局域场越大，电子越容易穿透空隙。我们的数值计算表明，当间距小于0.6 nm时，量子隧道效应大大降低了纳米粒子间间隙的增强能力。
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.