SNAP-THROUGH INSTABILITY OF GRAPHENE MORPHOLOGY ON SUBSTRATES

摘要

We determine the graphene morphology regulated by substrates with herringbone surface corrugation. As the graphene/substrate interfacial bonding energy and the substrate surface roughness vary, the graphene morphology snaps between two distinct states: 1) closely conforming to the substrate and 2) remaining nearly flat on the substrate. Such a snap-through instability of graphene can potentially lead to desirable electronic properties to enable graphene-based devices.