Figure 2.

aAg / As on substrates with herringbone surface corrugations as a function of D/ε for various λx. At a threshold value of D/ε, the graphene morphology snaps between two distinct states: b closely conforming to the substrate surface and c remaining nearly flat on the substrate surface

Li and Zhang Nanoscale Research Letters 2009 5:169-173   doi:10.1007/s11671-009-9460-1