Controlled preparation of well-ordered transition metal oxide layers on a metallic surface

被引：20

作者：

Middeke, J ^{[1
]}

Blum, RP ^{[1
]}

Hafemeister, M ^{[1
]}

Niehus, H ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

来源：

SURFACE SCIENCE | 2005年 / 587卷 / 03期

关键词：

scanning tunneling microscopy; growth; catalysis; vanadium oxide; niobium; molybdenum oxide; single crystal surfaces; metallic surfaces;

D O I：

10.1016/j.susc.2005.03.065

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：

A method to create various well-ordered two dimensional transition metal oxide films on a metallic substrate has been exploited. The formation of an intermediate amorphous layer with controllable metal-oxygen stoichiometry serves as an important precursor condition for the final transformation into a mono-phase, crystalline oxide layer via mild annealing. As a key ingredient serves a Cu3Au(1 0 0) substrate covered by oxygen. The flat Cu-O topmost layer stops completely intermixing of the substrate material with the subsequently evaporated transition metal film. Likewise the wetting of the surface is considerably enhanced and a homogeneous oxidation of the film is strongly promoted. The proposed technique appears to be widely efficient for preparation of various two dimensional oxide films covering the entire Cu3Au(1 0 0) substrate. Its usefulness is demonstrated successfully for vanadium, niobium and molybdenum to produce a set of single-phase transition metal oxides of different stoichiometry and geometrical structure. All created oxides are found to be thermally stable at least up to a substrate temperature of 800 K. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：219 / 228

页数：10