Role of bulk thermal defects in the reconstruction dynamics of the TiO2(110) surface.
Role of bulk thermal defects in the reconstruction dynamics of the TiO2(110) surface.
复制标题
体热缺陷在 TiO2(110) 表面重构动力学中的作用。
DOI：
10.1103/physrevlett.90.046104
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发表时间：
2003
影响因子：
8.6
通讯作者：
N. Bartelt
中科院分区：
文献类型：
--
作者：
K. Mccarty;N. Bartelt
我们使用低能电子显微镜显示，改变缺氧的金红石结构晶体的温度会导致（110）表面上的台阶移动。这种运动的发生是因为体氧空位的浓度随温度而变化，需要将材料添加到表面或从表面减去。在低于体化学计量依赖温度的冷却过程中，表面在表面台阶扫过的区域中重建成1x2结构，表明形成1x2相所需的结构和组成变化由表面到体质量流促进。
We use low-energy electron microscopy to show that changing the temperature of oxygen-deficient, rutile-structure crystals causes steps on the (110) surfaces to move. This motion occurs because the concentration of bulk oxygen vacancies changes with temperature, requiring that material be added to or subtracted from the surface. During cooling below a bulk-stoichiometry-dependent temperature, the surface reconstructs into a 1x2 structure in the regions surface steps have swept through, showing that the structural and compositional changes needed to form the 1x2 phase are facilitated by the surface-to-bulk mass flow.