Electronic excitations induced by surface reactions of H and D on gold

被引：53

作者：

Mildner, Beate

Hasselbrink, Eckart

Diesing, Detlef ^{[1
]}

机构：

[1] Univ Duisburg Gesamthsch, Fachbereich Chem, CeNIDE, D-45117 Essen, Germany

[2] Univ Duisburg Gesamthsch, Ctr Nanointegrat, D-45117 Essen, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 432卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2006.10.048

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：

Chemically induced hot carriers are detected with a time resolution of 0.1 s by measuring currents in Ta/TaOx/Au tunnel junctions while the Au top electrode is exposed to atomic hydrogen. Up to 3.5 nA cm(-2) are measured when exposing the Au surface to a flux of 0.4 ML s(-1). Comparison of the recorded current traces with modeled reaction kinetics indicates a large contribution from the Langmuir-Hinshelwood (LH) reaction. 4.5 times larger signals are observed for hydrogen than for deuterium exposure. A model using the concept of electronic friction provides first insights into the structure of the induced electronic excitations. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：133 / 138

页数：6

共 31 条

[1]

[Anonymous], T FARADAY SOC

[2]

Atkins P. W., 1982, PHYS CHEM

[3] STICKING, ADSORPTION, AND ABSORPTION OF ATOMIC-H ON CU(110) [J].