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arXiv 0901.0607cond-mat.mes-hall
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金属纳米带隙中量子隧穿效应对表面增强拉曼散射的影响

Effects of Quantum Tunneling in Metal Nano-gap on Surface-Enhanced Raman Scattering

Li Mao, Zhipeng Li, Biao Wu, Hongxing Xu

摘要:

利用含时密度泛函理论研究了两金属板间的量子隧穿效应。结果表明,隧穿主要取决于板间的间距和初始局域场。间距越小,局域场越大,电子越容易穿隧。数值计算表明,当间距小于0.6nm时,量子隧穿效应显著降低了纳米粒子间的相互作用增强能力。

英文摘要:

The quantum tunneling effects between two metallic plates are studied using the time dependent density functional theory. Results show that the tunneling is mainly dependent 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 reduce the enhancing ability of interstice between nanoparticles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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