The interaction of oxygen molecules with iron films studied with MIES, UPS and XPS

被引：39
|
作者：
Volgmann, K. [1 ]
Voigts, F. [1 ]
Maus-Friedrichs, W. [1 ,2 ]
机构：
[1] Tech Univ Clausthal, Inst Phys & Phys Technol, D-38678 Clausthal Zellerfeld, Germany
[2] Clausthaler Zentrum Mat Tech, D-38678 Clausthal Zellerfeld, Germany
来源：
SURFACE SCIENCE | 2010年 / 604卷 / 11-12期
关键词：
Metastable Induced Electron Spectroscopy; Ultraviolet Photoelectron Spectroscopy; X-ray Photoelectron Spectroscopy; Iron; Iron oxide; MARTIAN ATMOSPHERE; ADSORPTION; METHANE; SURFACES; WATER; H2O; CO2;
D O I：
10.1016/j.susc.2010.02.018
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：
X-ray Photoelectron Spectroscopy (XPS), Metastable Induced Electron Spectroscopy (MIES) and Ultraviolet Photoelectron Spectroscopy (UPS) were applied to study the interaction of oxygen molecules with iron films. Supplementarily, iron oxide was investigated for comparison. With XPS from the Fe 2p(3/2) range contributions of metallic Fe as well as Fe2+ and Fe3+ can be distinguished. During the interaction with oxygen an oxide film is formed on the iron surface. Nevertheless, XPS still shows metallic contributions even for a surface which is saturated with more than 10(4) L The oxide film hinders the dissociation of further impinging oxygen molecules. The interaction of He* atoms with iron oxide surfaces during MIES is dominated by Auger Neutralization. This surprising result follows from the high work function and the fact that intrinsic defects result in a Fermi level pinning to the conduction band. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：906 / 913
页数：8
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