通过超高真空解理制备TiO₂(110)-(1x1)表面：一项扫描隧道显微镜研究

Preparation of TiO2(110)-(1x1) surface via UHV cleavage: an scanning tunneling microscopy study.

作者信息

Bondarchuk O, Lyubinetsky I

机构信息

Center for Materials Chemistry, Texas Materials Institute, University of Texas, Austin, Texas 78712, USA.

出版信息

Rev Sci Instrum. 2007 Nov;78(11):113907. doi: 10.1063/1.2814160.

DOI:10.1063/1.2814160

PMID:18052488

Abstract

TiO2(110) surface was successfully prepared in situ by UHV cleaving of a commercial TiO2 crystal. Scanning tunneling microscopy (STM) imaging revealed atomically flat more than 1 mum wide terraces with (110) orientation separated by steps running in [001] direction, with very low kink density. Atomically resolved STM images show periodicity in the [001] and [110] directions with the unit cell parameters measured to approximately 3 and 6.5 A, respectively, which are closed to the expected values of bulk terminated (1 x 1) surface.

摘要

通过对商用TiO₂晶体进行超高真空劈裂，成功原位制备了TiO₂(110)表面。扫描隧道显微镜(STM)成像显示，具有(110)取向的原子级平整且宽度超过1μm的平台，由沿[001]方向延伸的台阶分隔，扭折密度非常低。原子分辨的STM图像显示在[001]和[110]方向上具有周期性，测得的晶胞参数分别约为3 Å和6.5 Å，这与体终止(1×1)表面的预期值相近。