An STM study of the UO2(001) surface

被引：32

作者：

Muggelberg, C

Castell, MR

Briggs, GAD

Goddard, DT

机构：

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

[2] BNFL, Springfields Works, Res & Technol, Preston PR4 0XJ, Lancs, England

来源：

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

关键词：

low energy electron diffraction (LEED); low index single crystal surfaces; scanning tunnelling microscopy; surface structure; uranium oxide;

D O I：

10.1016/S0169-4332(98)00664-3

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 UO2(001) surface has been studied by elevated-temperature scanning tunnelling microscopy (STM) and low-energy electron diffraction (LEED). The first reported STM images taken of the UO2(001) surface reveal a maze-like structure which can be resolved atomically at negative sample bias. The observed atomic periodicity corresponds to half a monolayer of oxygen arranged in slightly relaxed (1 x 1) out-of-phase domains along the [110] and [(1) over bar 10] directions. The shape and arrangement of the domains causes a splitting of the LEED beams which appears as crosses in the LEED pattern. STM also allows the observation of trenches with microscopic {111} facets which may contribute to a decrease in surface energy and stabilisation of the surface. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：124 / 128

页数：5

共 16 条

[1] Structural investigation of the NiO(111) single crystal surface [J].