Micro-structure fabrication of graphene-oxide film by photocatalytic-assisted transfer printing

2020 Fiscal Year Final Research Report

• Project/Area Number: 18H01352
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Kaneko Arata 東京都立大学, システムデザイン研究科, 教授 (30347273)
• Co-Investigator(Kenkyū-buntansha): 武田 伊織 東京大学, 大学院工学系研究科(工学部), 特任研究員 (70792266) ; 諸貫 信行 東京都立大学, システムデザイン研究科, 教授 (90166463)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: トランスファプリント / 光触媒 / 微細構造 / 酸化グラフェン / ナノ粒子

Outline of Final Research Achievements

This study demonstrated photocatalytic-assisted transfer printing. The photocatalytic-assisted transfer printing is a process, in which a thin film is transfer-printed to be a micro-pattern by using a specified glass or PDMS stamp with TiO2 layer. The photocatalytic effect generated by UV-irradiated TiO2 decomposed molecules of releasing layer (polystyrene or AHAPS self-assembled monolayer), so that a Au thin film was easily released from the stamp and was successfully transfer-printed to a PET substrate with low releasing force. Especially, it was found self-assembled monolayer of releasing layer was preferable for this proposed process because of easily decomposed molecules. Graphene oxide (GO) nanoparticles were also micro-structured by the transfer printing and the related printing technologies. A micro-bridge of laminated thin film of Au and GO nanoparticles had better mechanical properties than that of Au thin film.

Free Research Field

微細加工とMEMS応用

Academic Significance and Societal Importance of the Research Achievements

本研究では光触媒をトランスファプリント（TP）の離型処理に応用している．光触媒効果は一部の高分子加工などを除き，親水化や防汚化が主目的で，離型処理への適用例はない． 提案手法は成膜性と離型性を両立させ，従来の表面改質とは異なる原理で，加工学・表面工学分野で新規性・独創性の高い知見が得られた．また，酸化グラフェン（GO）ナノ粒子をAu薄膜の強化材へ応用し，TPによる微細構造化した．グラフェンは有用な機械材料だが構造化が困難で，GOナノ粒子は機械材料としての応用例が少ない．本研究によりGOナノ粒子の新たな用途を実証でき，ナノ・マイクロ領域の加工学・材料工学で新規性の高い知見が得られた．