The carbon's solubility into copper is amazingly minimal and therefore mostly area diffusion and nucleation of carbon atoms are concerned. Due to this and the growth kinetics, the graphene thickness is limited to predominantly a monolayer. The large gain would be that the graphene could be grown on Cu foil https://www.facebook.com/permalink.php?story_fbid=pfbid0h4QJMwKx3aakby75jMuYHhcFNff9wYmvg8VwHDtd5gGqJBKiFqtZbeRj5off8T7rl&id=61562415773754&__cft__[0]=AZWvBaUb3XdyEBjsDtjB7TJZIA4reqzAlFMLAizyo2ySB6P_-WEAP0ZcufAO5Ze_w0dst-k-urN6cw4Yr-8K6ufQs3weUK6MIzJP9MluvuNt3-Uem5YmXNEcf7n_5rscXeUtOQx4o7bvtKR_wrnJy8sBEjBf_KsGTkJvroH8Q1oaHBnzyR-0o1bsNqkIG-rkNCikAqUpcIIMINJWaDwHos8e&__tn__=%2CO%2CP-R