电化学鼓泡转移石墨烯及其性能的研究

Electrochemical bubbling transfer of graphene and its characteristics

石墨烯作为新型二维碳材料,因其具有诸多优异的电、热和机械特性,在高速晶体管、手机触屏、太阳能电池和超级电容器等电子器件上有广阔的应用前景。这些应用主要依赖于石墨烯薄膜能否高质量地从金属基片转移到目标基片。采用电化学鼓泡法转移石墨烯,用聚甲基丙烯酸甲酯(PMMA)/G/Cu作阴极,Pt箔作阳极,在NaOH电解液中发生水解反应。阴极Cu箔表面产生氢气气泡,数十秒内可将PMMA/石墨烯与Cu剥离。采用电化学鼓泡法转移的石墨烯样品完整,清晰,没有破损,方阻和透光率分别为835Ω/和94.8%,表现出良好的透光性和导电性,有望应用于工业上的大规模转移石墨烯。

Graphene,as a new two-dimensional carbon material,due to its many excellent electrical,thermal and mechanical properties,has a broad application prospect for the electronic devices such as high-speed transistor,mobile phone touch screen,solar battery and super capacitor.These applications are mainly rely on high quality graphene films transferred to the target substrate from the metal substrate.Electrochemical bubbling method was presented using PMMA/G/Cu as cathode and Pt as anode in NaOH aqueous solution.Bubbling for tens of seconds was enough to completely separate the PMMA/graphene layer from the cu foil.The graphene sample transferred by electrochemical bubbling was complete,clear and undamaged.The sheet resistance and light transmittance of sample were 835Ω/□and 94.8%,respectively,which was promising to be applied to large-scale industry to transfer graphene.