2013 Fiscal Year Final Research Report
Study of surface structural change in the wettability change of rutile titanium dioxide surface
| Project/Area Number |
24760542
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 光誘起構造変化 / 表面Ｘ線回折 / 表面濡れ性 |
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| Research Abstract |
I studied the structure of the rutile-titanium dioxide (110) surface during the ultraviolet-light-induced hydrophilic reaction. By using a newly developed high-speed surface x-ray diffraction measurement technique, I could show the direct evidence that the surface structure is changed during the hydrophilic reaction. Detailed structural analysis show that water molecules are regularly ordered on the hydrophobic surface, while on the hydrophilic surface the surface roughness is increased due to the oxygen vacancies created by the ultraviolet light, and the regular array of the water molecules are lifted on the rough surface. I could finally suggest that on the ultraviolet light irradiated surface the water molecules, which are not strongly restricted from the surface lattice potential, can make a hydrogen bond network with each other much easily than the well ordered hydrophobic surface.
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[Journal Article]2013
Author(s)
Voegeli, T. Matsushita, E. Arakawa T. Shiraswa, T. Takahashi, and Y. F. Yano, Jour. of Phys.
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Journal Title
Jour. of Phys.: Conference series
Volume: vol. 424
Pages: 092003-1-4
DOI
Peer Reviewed
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