title: Selective metal deposition on photoswitchable molecular surfaces.
abstract: We report here a novel phenomenon: selective metal deposition on photoswitchable diarylethene (DAE) surfaces. Magnesium vapor was deposited by vacuum evaporation on the colored DAE but not on the uncolored surface. The selective deposition originates in the change of the glass transition temperature of the amorphous DAE film resulting from photoisomerization and therefore from changes of surface molecular motion. We clarified that Mg atoms on the uncolored surface actively migrated on the surface and were desorbed from the surface. The possibility of depositing other metals is also discussed. Light-controllable metal-integrated deposition was demonstrated as a new function of the photoswitchable molecular surfaces. This study reveals new features of the photoswitchable molecular surfaces, and their potential suggests bright prospects for future applications in organic electronics.
authors.affiliation: Department of Arts and Sciences, Faculty of Education, Osaka Kyoiku University, Asahigaoka 4-698-1, Kashiwara 582-8582, Japan. tsujioka@cc.osaka-kyoiku.ac.jp
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Tsujioka
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Sesumi
authors.forename: Rie
authors.initials: R
authors.lastname: Takagi
authors.forename: Kyoko
authors.initials: K
authors.lastname: Masui
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yokojima
authors.forename: Kingo
authors.initials: K
authors.lastname: Uchida
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Nakamura