High-Yield Production and Transfer of Graphene Flakes Obtained by Anodic Bonding

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• 作者：Thomas Moldt ; Axel Eckmann ; Philipp Klar ; Sergey V. Morozov ; Alexander A. Zhukov ; Kostya S. Novoselov ; Cinzia Casiraghi
• 刊名：ACS Nano
• 出版年：2011
• 出版时间：October 25, 2011
• 年：2011
• 卷：5
• 期：10
• 页码：7700-7706
• 全文大小：943K
• 年卷期：0
• ISSN：1936-086X

文摘

We report large-yield production of graphene flakes on glass by anodic bonding. Under optimum conditions, we counted several tens of flakes with lateral size around 20–30 μm and a few tens of flakes with larger size. About 60–70% of the flakes have a negligible D peak. We show that it is possible to easily transfer the flakes by the wedging technique. The transfer on silicon does not damage graphene and lowers the doping. The charge mobility of the transferred flakes on silicon is on the order of 6000 cm²/V s (at a carrier concentration of 10¹² cm^–2), which is typical for devices prepared on this substrate with exfoliated graphene.