Figure 1.

MD simulations of surface diffusion in C60/graphene system. (a) The side view of a C60 molecule above a graphene sheet. The inset shows the top view. (b-d) Four nanosecond trajectories of C60 at (b) ultra-low temperature regime. Single hopping mechanism is dominant at 5 K, which gradually turns to multiple jumps up to 25 K. Even at 15 and 25 K, some signs of quasi-continuous motion are observable. (c) Low temperature regime, which shows quasi-continuous Brownian motion (Regime III). (d) High temperature regime, which shows ballistic-like Brownian motion (Regime IV).

Jafary-Zadeh et al. Nanoscale Research Letters 2012 7:148   doi:10.1186/1556-276X-7-148
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