| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2009: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
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| Research Abstract |
Effects of surface water film and hierarchical solid texture on the highly hydrophilic surface was investigated using various TiO2 samples and probe microscopy. When UV was irradiated onto the surface of polycrystalline rutile ceramics, the friction force first increased and then decreased. Once the water contact angle of the rutile surface reached the lower limit, the friction force increased gradually. Increased friction force was attributable to decomposition of the surface organic contaminant and subsequent friction force decrease and gradual increase are attributed to water adsorption. From the force curve measurement, the thickness of water layer was estimated as 2. 3 nm separation. Moreover, an excellent photoinduced hydrophilicizing rate and the sustainability of hydrophilicity were obtained from the brookite-heteropolyacid hybrid films. The mechanism of these properties was discussed from the viewpoint of hydrophilic points in the solid surface.
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