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Effect of γ-ray Irradiation on the Wettability of TiO2 Single Crystals

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The contact angles of the water droplets on TiO2 single crystal surfaces decreased and became superhydrophilic state by γ-ray irradiation. It was found that these behaviors were dependent on γ-ray irradiation atmosphere, i.e., in air and in N2 atmosphere (r. h.; 30%) as well as crystal faces of TiO2 single crystals, i.e., TiO2 (100) and (110) surfaces. It was also found from the results of UV–Vis and ESR measurements that γ-ray irradiation under N2 atmosphere led to the oxygen vacancies and associated Ti3+, regardless of the presence of gaseous water. Moreover, it was suggested that the organic molecules adsorbed on TiO2 single crystal surfaces decomposed by γ-ray irradiation.

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Osaka, Sakai, 599-8531, Japan

    Satoru Dohshi & Masakazu Anpo

  2. Research Center for Radiation and Radioisotopes, Research Institute for Advanced Science and Technology, Osaka Prefecture University, 1-2 Gakuen-cho, Osaka, Sakai, 599-8570, Japan

    Shuichi Okuda & Takao Kojima

Authors
  1. Satoru Dohshi
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  2. Masakazu Anpo
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  3. Shuichi Okuda
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  4. Takao Kojima
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Correspondence to Masakazu Anpo.

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Dohshi, S., Anpo, M., Okuda, S. et al. Effect of γ-ray Irradiation on the Wettability of TiO2 Single Crystals. Top Catal 35, 327–330 (2005). https://doi.org/10.1007/s11244-005-3841-1

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  • DOI: https://doi.org/10.1007/s11244-005-3841-1

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