Laser direct writing of reduced graphene oxide micropatterns and sensor applications

Akira Watanabe, Jinguang Cai

    研究成果: Conference contribution

    1 被引用数 (Scopus)


    Micropatterns consisting of reduced graphene oxide (rGO) and graphene oxide (GO) were fabricated via laser direct writing where an insulating GO was converted to a conductive rGO by laser-induced reduction. The rGO/GO microinterdigitated electrode showed humidity sensing behaviors. The influence of the shape and size of the rGO/GO microinterdigitated electrode was studied to discuss the sensing mechanism and to improve the sensitivity. Three kinds of rGO(w)/GO(g) micropatterns were prepared by laser direct writing on a GO-coated PET (polyethylene terephthalate) substrate using a CW 405 nm semiconductor laser, where w and g are the rGO electrode width and the GO gap width between rGO electrodes in micrometer unit, respectively. The humidity sensing properties of rGO(400)/GO(100), rGO(160)/GO(40), and rGO(80)/GO(20) were studied by monitoring the output voltage waveform from an electronic circuit consisting an rGO/GO interdigitated electrode and resistors in AC mode operation. The sensitivity enhancement induced by charging property of an rGO/GO interdigitated electrodes was observed accompanying transient decay of the output voltage. The shape and size of an rGO/GO interdigitated electrode remarkably influenced the humidity sensing behaviors depending on the contribution ratio of C and R parameters.

    ホスト出版物のタイトルLaser-Based Micro- and Nanoprocessing XII
    編集者Kunihiko Washio, Rainer Kling, Udo Klotzbach
    出版ステータスPublished - 2018
    イベントLaser-Based Micro- and Nanoprocessing XII 2018 - San Francisco, United States
    継続期間: 2018 1月 302018 2月 1


    名前Proceedings of SPIE - The International Society for Optical Engineering


    OtherLaser-Based Micro- and Nanoprocessing XII 2018
    国/地域United States
    CitySan Francisco

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学
    • コンピュータ サイエンスの応用
    • 応用数学
    • 電子工学および電気工学


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