Delocalized electron resonance at the alkanethiolate self-assembled monolayer/Au(111) interface

被引：27

作者：

Muntwiler, M ^{[1
]}

Lindstrom, CD ^{[1
]}

Zhu, XY ^{[1
]}

机构：

[1] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 2006年 / 124卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2171437

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We probe the electronic structure of alkanethiolate self-assembled monolayers (SAMs) on Au(111) using two-photon photoemission spectroscopy. We observe a dispersive unoccupied resonance close to the vacuum level with a lifetime shorter than 30 fs. The short lifetime and the insensitivity of the energy level and dispersion to molecular length (and thus layer thickness) suggest that the probability density of the electron wave function is concentrated inside the molecular layer close to the SAM/Au interface. Such an interfacial resonance results from the image like potential at the SAM/Au interface.

引用

页数：3

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