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. 2019 Nov 15;5(11):eaax9301. doi: 10.1126/sciadv.aax9301

Fig. 2. Snapshots of the friction simulation of DLC-D.

Fig. 2

(A) Initial configuration of sliding asperities. (B) Deformation of DLC asperities during the collision. (C) Deformation disappears during the separation of asperities, and hydrocarbon molecules are emitted from the DLC surfaces. (D to F) Continuous triboemission of hydrocarbon molecules with repeated collision and separation of sliding asperities. During the 500-ps simulation, the two DLC asperities collide five times because of the periodic boundary condition.