[8a-B11-1~13] 8.2 Plasma deposition of thin film, plasma etching and surface treatment

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8a-B11-5] Photocatalytic Activity of Laser-Oxidized WS₂/Au/TiO₂/Au Multilayer Thin Films

〇(M2)Tomoya Inoue¹, Retsuo Kawakami¹, Shin-ichiro Yanagiya^1,2, Pankaj Koinkar¹, Akihiro Furube^1,2, Yoshitaka Nakano³, Masahito Niibe⁴ (1.Tokushima Univ., 2.pLED, Tokushima Univ., 3.Chubu Univ., 4.The Univ. of Tokyo)

Keywords:

sputtering,localized surface plasmon resonance,Laser-Oxidized WS2

Improving light utilization efficiency is crucial for enhancing photocatalytic performance. Recently, photocatalytic systems utilizing localized surface plasmon resonance (LSPR) have attracted considerable attention. We previously demonstrated that TiO₂/Au/TiO₂/Au (IMIM) multilayer thin films exhibit high photocatalytic activity; however, their visible-light absorption remains insufficient. To address this issue, WS₂, a material with strong visible-light absorption, was introduced as the top layer. Furthermore, laser irradiation in liquid was employed to partially oxidize WS2, forming a WS₂/WO_3-x heterostructure and yielding LO-WS₂-IMIM thin films. In this study, the photocatalytic properties of LO-WS₂-IMIM were evaluated and compared with those of TiO₂-IMIM thin films.