Formation and diffusion of oxygen-vacancy pairs on TiO2(110)-(1×1)

• DOI: 10.1063/1.2955448
• Publication Date: 2008-07-24T22:49:08Z
• Authors: Xuefeng Cui; Bing Wang; Zhuo Wang; Tian Huang; Yan Zhao; Jinlong Yang; J. G. Hou
• Keywords: Surface diffusion

We present the measurements for diffusion of bridging oxygen vacancy (OV) crossover Ti rows via OV pairs (OVPs). Using a high-resolution scanning tunneling microscope (STM), we show that OVs can be moved along driven by STM tip at voltages higher than 3.0 V on TiO(2)(110)-(1x1) surface. It is found combination OVPs leads to formation OVPs, which diffuse under mediation in adjacent rows. The deduced activation energy diffusive from experiments agreement with first-principles calculations. reaction O(2) lower 82 meV.