Adhesion and friction forces at the nanoscale have dramatic effects in nanoscale materials and devices; understanding and predicting these forces present many fascinating challenges that remain unresolved. In this talk, I will discuss the nature of friction and adhesion measured with atomic force microscopy for nanoscale contacts with truly 2-dimensional materials including graphene. We find that the friction force exhibits a significant dependence on the number of 2-D layers present, while the adhesion force, measured using an established method, does not. However, we find that time- and history-dependent effects in the adhesion measurements provide an important clue to understanding the underlying mechanisms, which appear to be unique to 2-D atomic membranes. References:1.         Lee, C., Li, Q., Kalb, W., Liu, X.-Z., Berger, H., Carpick, R.W. and Hone, J. Frictional characteristics of atomically-thin sheets. Science 328 , 76-80 (2010).

Friction     in Flatland: Nanotribological behavior of graphene and other atomic     membranes

244th National Meeting (2012)

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