Large-Area Graphene Single Crystals Grown by Low-Pressure Chemical Vapor Deposition of Methane on Copper

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• 作者：Xuesong Li ; Carl W. Magnuson ; Archana Venugopal ; Rudolf M. Tromp ; James B. Hannon ; Eric M. Vogel ; Luigi Colombo ; Rodney S. Ruoff
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：March 9, 2011
• 年：2011
• 卷：133
• 期：9
• 页码：2816-2819
• 全文大小：814K
• 年卷期：v.133,no.9(March 9, 2011)
• ISSN：1520-5126

文摘

Graphene single crystals with dimensions of up to 0.5 mm on a side were grown by low-pressure chemical vapor deposition in copper-foil enclosures using methane as a precursor. Low-energy electron microscopy analysis showed that the large graphene domains had a single crystallographic orientation, with an occasional domain having two orientations. Raman spectroscopy revealed the graphene single crystals to be uniform monolayers with a low D-band intensity. The electron mobility of graphene films extracted from field-effect transistor measurements was found to be higher than 4000 cm² V^鈭? s^鈭? at room temperature.