Figure 3.

I-V relations, obtained from four-point measurements, for graphene on MCT substrate and for sole MCT wafer at room temperature. Here, RMCT and RG are the resistances, respectively, for the MCT substrate and for the graphene film, and G is the resistivity for graphene layer on MCT thin wafer.

Xu et al. Nanoscale Research Letters 2011 6:250   doi:10.1186/1556-276X-6-250
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