TITLE

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

AUTHOR(S)
Li Mao; Zhipeng Li; Biao Wu; Hongxing Xu
PUB. DATE
June 2009
SOURCE
Applied Physics Letters;6/15/2009, Vol. 94 Issue 24, p243102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
42223789

 

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