Environmental Dependence of Atomic-scale Friction at Graphite Surface Steps
Atomic force microscopy experiments and molecular dynamics simulations show that friction between a nanoscale tip and atomically stepped surfaces of graphite is influenced by the environment. The presence of a small amount of water increases friction at atomic steps, but does not strongly influence friction on flat terraces.
Egberts, Philip; Ye, Zhijiang; Liu, Xin Z.; and Dong, Yalin, "Environmental Dependence of Atomic-scale Friction at Graphite Surface Steps" (2013). Mechanical Engineering Faculty Research. 820.