石墨烯
材料科学
氧化石墨烯纸
石墨
石墨烯纳米带
扫描电子显微镜
电子束诱导沉积
拉曼光谱
纳米技术
聚二甲基硅氧烷
蚀刻(微加工)
剥脱关节
图层(电子)
电子束光刻
化学工程
光电子学
作者
Sarah Goler,Vincenzo Piazza,Stefano Roddaro,Vittorio Pellegrini,Fabio Beltram,Pasqualantonio Pingue
摘要
We report on suspended single-layer graphene deposition by a transfer-printing approach based on polydimethylsiloxane stamps. The transfer printing method allows the exfoliation of graphite flakes from a bulk graphite sample and their residue-free deposition on a silicon dioxide substrate. This deposition system creates a “blistered” graphene surface due to strain induced by the transfer process itself. Single-layer-graphene deposition and its blistering on the substrate are demonstrated by a combination of Raman spectroscopy, scanning electron microscopy, and atomic-force microscopy measurements. Finally, we demonstrate that blister-like suspended graphene are self-supporting single-layer structures and can be flattened by employing a spatially resolved direct-lithography technique based on electron-beam induced etching.
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