[10a-W631-1~12] 3.7 Laser processing

[10a-W631-7] Microstructuring of graphene oxide-titanium dioxide nanoparticle hybrid film by laser direct writing

〇Akira Watanabe¹, Jinguang Cai², Sayaka Ogawa¹, Eiji Aoyagi³, Shun Ito³ (1.IMRAM, Tohoku Univ., 2.Inst. Mat., China Acad. Eng. Phys., 3.IMR, Tohoku Univ.)

Keywords:laser direct writing, reduced graphene oxide, titanium dioxide

The microstructure consisting of reduced graphene oxide (rGO), anatase and rutile titanium oxide (TiO₂) nanoparticles was prepared by laser direct writing on a hybrid film of graphene oxide (GO) and TiO₂. The structural changes of the hybrid film by CW 405 nm laser beam irradiation and the applications to a photosensor were studied. The melting of the anatase TiO₂ nanoparticles and the crystalline phase transition to rutile were observed by to SEM images and micro-Raman spectra. An rGO-TiO₂ periodic line structure showed the photosensitivity in the region from UV to IR.