[18p-P11-1~13] 12.2 Characterization and Materials Physics

[18p-P11-12] Mg-vapor atom behavior and nucleation on diarylethene surface with a low glass transition temperature

〇Ikumi Takemoto¹, Tsuyoshi Tsujioka¹ (1.Osaka Kyoiku Univ.)

Keywords:diarylethene, selective deposition, photochromism

We have reported selective metal-vapor deposition on the photochromic diarylethene (DAE) surface. This phenomenon signifies metal-vapor atoms are deposited on the colored surface but not on the colorless surface. Based on the selective metal deposition, electrode pattern of organic devices can be fabricated using maskless evaporation onto the DAE surface. This phenomenon is caused by a large difference of glass transition temperatures (Tg) of colorless and colored films. On the colorless surface with a low Tg, Mg-vapor atoms are adsorbed, diffuse, and then desorb. We investigated the deposition-threshold time for the Mg deposition on the colorless surface. When Mg atoms were evaporated at a deposition rate of 6.0 nm/s, the deposition started at the evaporation time of around 190 - 250 seconds. This result indicated nucleation probability increase on the surface during Mg diffusion and desorption.