Observation of a Snap-Through Instability in Graphene
  We examine the competition between adhesive and bending energies for few-layered graphene samples placed on rigid, microscale-corrugated substrates. Using atomic force microscopy, we show that the graphene undergoes a sharp "snap-through" transition as a function of layer thickness, where the material transitions between conforming to the substrate and lying flat on top of the substrate. By utilizing the critical snap-through thickness in an elasticity model for the FLG's bending, we extract a value for graphene-surface adhesion energy that is larger than expected for van der Waals forces. 
Scott Scharfenberg, Nikhita Mansukhani, Cesar Chialvo, Richard L.   Weaver, and Nadya Mason
cond-mat.mes-hall cond-mat.mtrl-sci