Formation of highly ordered Ca-overlayers on TiO2(110) surfaces studied by scanning tunneling microscopy and atomistic simulation

被引：10

作者：

Nörenberg, H

Harding, JH

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England

来源：

APPLIED SURFACE SCIENCE | 1999年 / 142卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

Ca-overlayers; TiO2(110) surfaces; scanning tunneling microscopy; atomistic simulation;

D O I：

10.1016/S0169-4332(98)00670-9

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：

An ordered surface layer of Ca on TiO2(110) has been prepared and studied after annealing of a TiO2-rutile crystal, During the annealing process Ca impurities from the bulk segregate to the surface. A well ordered p(3 x 1) reconstruction has been observed by scanning tunneling microscopy (STM). Calculations have shown that the p(3 x 1) reconstruction has the lowest energy. Every third Ca ion in the [001] direction is elevated by around 1 Angstrom. Therefore, the STM contrast is mainly due to calcium and caused by geometry rather than electronic effects. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：174 / 176

页数：3

共 19 条

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