  We study the effect of asperity size on the adhesion properties of metal
contact using atomistic simulations. The simulated size effect of individual
nanoscale asperityies is applied to macroscopic rough surfaces by introducing a
curvature radius distribution to a continuum-mechanics-based contact model. Our
results indicate that the contact adhesion can be optimized by changing the
curvature radius distribution of the asperity summits.
