Persistence of Structural Lubricity on Contaminated Graphite: Rejuvenation, Aging, and Friction Switches
Wai H. Oo,
Hongyu Gao,
Martin H. Müser
et al.
Abstract:Using atomic force microscopy experiments and molecular dynamics simulations of gold nanoislands on graphite, we investigate why ultralow friction commonly associated with structural lubricity can be observed even under ambient conditions. Measurements conducted within a few days after sample synthesis reveal previously undiscovered phenomena in structurally lubric systems: rejuvenation, a drop in kinetic friction of an order of magnitude shortly after the onset of sliding; aging, a significant increase in kin… Show more
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