Formation of a faceted MoO2 epilayer on Mo(112) studied by XPS, UPS and STM

被引：107

作者：

Schroeder, T

Zegenhagen, J

Magg, N

Immaraporn, B

Freund, HJ

机构：

[1] ESRF, F-38043 Grenoble, France

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

SURFACE SCIENCE | 2004年 / 552卷 / 1-3期

关键词：

X-ray photoelectron spectroscopy; visible and ultraviolet photoelectron spectroscopy; scanning tunneling microscopy; surface relaxation and reconstruction; chemisorption; oxidation; epitaxy; faceting;

D O I：

10.1016/j.susc.2004.01.010

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：

The open trough and row Mo(112) surface serves as substrate for the epitaxial growth Of MoO2. XPS, UPS and STM studies of the oxygen adsorption allow to monitor step-by-step the transformation of the electronic and morphological properties during this process. XPS and UPS spectra reveal that a stable oxygen chemisorbed state precedes the formation Of MoO2. STM topographs identify this oxygen chemisorbed phase as an oxygen-induced p(2 x 3) reconstruction of the missing row type. This precursor state evolves into a flat p(1 x 3) reconstructed (010) MoO2 layer which roughens by the formation of (110) facets under further oxygen exposure. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：85 / 97

页数：13

共 54 条

[11]

Ertl G., 1985, LOW ENERGY ELECT DIF

[12] Embedded Peierls instability and the electronic structure of MoO2 [J].