title: Photoinduced underwater superoleophobicity of TiO2 thin films.
abstract: The photoinduced wettabilities of water, n-hexadecane, dodecane, and n-heptane on a flat TiO2 surface prepared by a sol-gel method-based coating were investigated. An amphiphilic surface produced by UV irradiation exhibited underwater superoleophobicity with an extremely high static oil contact angle (CA) of over 160°. The TiO2 surface almost completely repelled the oil droplet in water. A robust TiO2 surface with no fragile nanomicrostructure was fabricated on a Ti mesh with a pore size of approximately 150 μm. The fabricated mesh was found to be applicable as an oil/water separation filter.
authors.affiliation: Department of Material and Energy Science, Graduate School of Environmental and Life Science, Okayama University, Kita-ku, Okayama 700-8530, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sawai
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nishimoto
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Kameshima
authors.forename: Eiji
authors.initials: E
authors.lastname: Fujii
authors.forename: Michihiro
authors.initials: M
authors.lastname: Miyake
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D006536:Heptanes / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D010316:Particle Size; D055668:Photochemical Processes; D010938:Plant Oils / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D017155:Wettability
chemical_list: D000473:Alkanes; D006536:Heptanes; D010938:Plant Oils; D014867:Water; C007548:n-dodecane; C009495:titanium dioxide; C028618:n-heptane; D014025:Titanium; C007932:n-hexadecane