The carbon's solubility into copper is extremely lower and for that reason largely floor diffusion and nucleation of carbon atoms are included. Due to this as well as the growth kinetics, the graphene thickness is limited to predominantly a monolayer. The massive edge is that the graphene could be grown https://www.quora.com/profile/Trevor-Flatcher-2/Comparative-analysis-of-silicon-carbide-and-traditional-silicon-materials-Silicon-Carbide-vs-Traditional-Silicon-Mater-1