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Creation of single oxygen vacancy on titanium dioxide surface

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Abstract

Physical and chemical properties of solid materials are modified by introducing defects, which disarrange the atomic periodic structure. Typical example is oxygen vacancies on titanium dioxide (TiO2) surfaces. Oxygen vacancies on TiO2 surfaces provide new physical and chemical surface properties, such as conductivity, catalytic activity, hydrophilicity, etc. To date, annealing, electron-/photo-stimulated desorption, and chemical reaction have been reported to create oxygen vacancies on TiO2 surfaces. However, these techniques do not allow position control of the defects at the atomic scale. We report the creation of single oxygen vacancy using a scanning tunneling microscope (STM). This technique creates oxygen vacancy at desired site. In addition, based on the experimental findings, we discuss the mechanism of manipulating atomic defects using the STM.

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Acknowledgment

This work was supported by Grant No. 21750002 from Ministry of Education, Culture, Sports, Science and Technology of Japan and the Japan Science Society and Sasakawa Foundation (the Japan Science Society) and Grant for Exploratory Research for Young Scientists (Tohoku University).

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Authors and Affiliations

  1. International Advanced Research and Education Organization, Tohoku University, 6-3 Aoba, Sendai, 980-8598, Japan

    Taketoshi Minato

  2. Surface and Interface Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

    Taketoshi Minato & Yousoo Kim

  3. Department of Advanced Materials Science, University of Tokyo, Kashiwa-shi, 277-8561, Japan

    Maki Kawai

Authors
  1. Taketoshi Minato
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  2. Maki Kawai
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  3. Yousoo Kim
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Correspondence to Taketoshi Minato.

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Minato, T., Kawai, M. & Kim, Y. Creation of single oxygen vacancy on titanium dioxide surface. Journal of Materials Research 27, 2237–2240 (2012). https://doi.org/10.1557/jmr.2012.157

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