TY - JOUR
T1 - Wettability control of photocatalytic crystal layers by hydrophobic coating and subsequent UV light irradiation
AU - Teshima, Katsuya
AU - Suzuki, Sayaka
AU - Yubuta, Kunio
AU - Sonobayashi, Yutaka
AU - Suzuki, Takaomi
AU - Shishido, Toetsu
AU - Sugimura, Hiroyuki
AU - Oishi, Shuji
N1 - Funding Information:
This research has been supported by “Grant-in-Aid for Young Scientists (Start-up) (No. 18860034)” and “Grant-in-Aid for Young Scientists (B) (No. 19760466)” from the Ministry of Education, Culture, Sport, Science and Technology, Japan. A part of this work has been supported by the TEPCO Research Foundation and The Salt Science Research Foundation, No.0706. A part of this work has been performed under the interuniversity cooperative research program of Advanced Research Center Metallic Glasses, Institute for Materials Research, Tohoku University.
PY - 2008/12/25
Y1 - 2008/12/25
N2 - Wettability of solid surfaces with water is governed by surface morphology and composition. In this study, a surface finishing technique consisting of three processes, that is, nanotexturing by nanosized photocatalytic crystal coating, hydrophobic coating by chemical vapor deposition and subsequent ultraviolet light photolithography, was employed to form ultrahydrophobic/ultrahydrophilic solid surfaces. Flux grown nanosized K4Nb6O17 crystals were selected as a photocatalyst. A proper nanotexure of crystal layer surfaces enhanced their hydrophobicity. The rough solid surfaces modified by alkyl- and fluoro-alkyl silane were converted from ultrahydrophobic (> 150°) to ultrahydrophilic (< 10°) by photocatalytic oxidation using the K4Nb6O17 crystal layer. Fine pitch ultrahydrophobic/ultrahydrophilic patterns were readily obtained by photocatalytic lithography by use of area-selective 254 nm-ultraviolet light irradiation.
AB - Wettability of solid surfaces with water is governed by surface morphology and composition. In this study, a surface finishing technique consisting of three processes, that is, nanotexturing by nanosized photocatalytic crystal coating, hydrophobic coating by chemical vapor deposition and subsequent ultraviolet light photolithography, was employed to form ultrahydrophobic/ultrahydrophilic solid surfaces. Flux grown nanosized K4Nb6O17 crystals were selected as a photocatalyst. A proper nanotexure of crystal layer surfaces enhanced their hydrophobicity. The rough solid surfaces modified by alkyl- and fluoro-alkyl silane were converted from ultrahydrophobic (> 150°) to ultrahydrophilic (< 10°) by photocatalytic oxidation using the K4Nb6O17 crystal layer. Fine pitch ultrahydrophobic/ultrahydrophilic patterns were readily obtained by photocatalytic lithography by use of area-selective 254 nm-ultraviolet light irradiation.
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U2 - 10.1016/j.surfcoat.2008.05.016
DO - 10.1016/j.surfcoat.2008.05.016
M3 - Article
AN - SCOPUS:55749108202
SN - 0257-8972
VL - 203
SP - 812
EP - 815
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
IS - 5-7
ER -