Fig. 11
From: Study of Nanoscale Friction Behaviors of Graphene on Gold Substrates Using Molecular Dynamics
The variation of friction force and average friction force for different flake sizes for the friction process without the movement constraint of graphene in the y direction. The typical friction force as a function of sliding distance for the 2.0 nm (N = 160 atoms) flake (a) and 10 nm (N = 3936 atoms) flake (b). c The average friction force per atom (Ffric/N) as a function of load per atom (L/N). Here, a0 (= 9.99 Å) is the lattice spacing of Au(111) along the sliding direction