Graphene on nickel is a few monolayers thick, usually between 1-7 layers with an average of 4 monolayer thickness. It looks like a patchwork, whereas each Ã¢ÂÂpatchÃ¢ÂÂ has a different thickness. The graphene layers within the same patch are aligned relative to each other. The size of each patch is about 3-10 microns.
One Wafer 100mm -4 in