title: Photoinduced formation of superhydrophobic surface on which contact angle of a water droplet exceeds 170° by reversible topographical changes on a diarylethene microcrystalline surface.
abstract: A superhydrophobic surface on which the contact angle of a water droplet exceeds 170° was reversibly produced by alternate irradiation with UV and visible light. Superhydrophobicity is due to the formation of densely generated submicrometer sized needle-shaped crystals (less than 0.2-0.3 μm diameter and 2.2-2.5 μm long) at 30 °C, which is much lower than the eutectic temperature of either isomers of the diarylethene. Below the eutectic temperature, the generated crystals were much smaller than those generated above the eutectic temperature. These smaller crystals more effectively enhanced the superhydrophobicity.
authors.affiliation: Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Nishikawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kiyohara
authors.forename: Shingo
authors.initials: S
authors.lastname: Sakiyama
authors.forename: Seiji
authors.initials: S
authors.lastname: Yamazoe
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Mayama
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Tsujioka
authors.forename: Yuko
authors.initials: Y
authors.lastname: Kojima
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yokojima
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Nakamura
authors.forename: Kingo
authors.initials: K
authors.lastname: Uchida
mesh_terms: D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D055668:Photochemical Processes; D013499:Surface Properties; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D006841:Hydrocarbons, Aromatic; D014867:Water