Fig. 2: Mechanical characterization of interface interaction of graphene/substrate.
From: Friction hysteretic behavior of supported atomically thin nanofilms
a A schematic diagram showing the correlation between the phase signal and the local bonding state of the graphene/substrate interface. Phase images of b, c heated and d, e unheated graphene samples. The numbers within the images indicate the layer number. f The phase difference and the stiffness difference between substrate and graphene for unheated and heated samples. The error bars in f indicate the standard deviation in the average phase value.
