Growth of Large-Area Single- and Bi-Layer Graphene by Controlled Carbon Precipitation on Polycrystalline Ni Surfaces
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چکیده
We report graphene films composed mostly of one or two layers of graphene grown by controlled carbon precipitation on the surface of polycrystalline Ni thin films during atmospheric chemical vapor deposition (CVD). Controlling both the methane concentration during CVD and the substrate cooling rate during graphene growth can significantly improve the thickness uniformity. As a result, oneor twolayer graphene regions occupy up to 87% of the film area. Single layer coverage accounts for 5– 11% of the overall film. These regions expand across multiple grain boundaries of the underlying
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تاریخ انتشار 2009