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
收藏
页码：174 / 176
页数：3
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