[2Bp01-10] Surface Analysis/Applied Surface Science/Evaluation Technique (ASS)

[2Bp04] Non-contact atomic force microscopy study of line defect on rutile TiO₂(110)-(1×2) reconstructed surface

*Daiki Katsube¹, Tatsuya Yokoi², Eiichi Inami³, Fengxuan Li⁴, Katsuyuki Matsunaga², Masayuki Abe⁴ (1. Cluster for Pioneering Research, RIKEN, 2. Department of Materials Physics, Nagoya University, 3. School of System Engineering, Kochi University of Technology, 4. Graduate school of Engineering Science, Osaka University)

TiO₂(110)-(1×2) surface has a distinctive oxygen vacancy of the line defect. We evaluate the structure and charge of the line defect by combining atomic force microscopy and theoretical calculations to understand the photocatalytic reactivity of the line defect. Imaging patterns of the line defect depending on tip polarity suggest that the line defect has a charge. We determined the charge polarity of the line defect by measurements of the local contact potential difference with atomic force microscopy.