[1P04] The size effect of surface defects on atomic-scale peeling of graphene
The effect of surface defects on the peeling of graphene sheets from a graphite substrate is reported. A molecular mechanics simulation of the peeling of graphene sheets adsorbed onto the graphite substrate with surface defects was performed. The peeling forces and energies acting on the graphene sheets were simulated to study effect of the size of the surface defect and the graphene sheet on the peeling process. The results showed that the pull-up height when the sheet transition from the surface contact to the line contact occurs, strongly depends on the defect diameter size ratio to the sheet width. Furthermore, during some cases of the peeling process, when the free edge reaches the defect larger than a certain size, the free edge jumps discontinuously to avoid the lattice defect. Energy dissipation is also observed simultaneously with discontinuous jumps. The energy dissipation increases as the defect size ratio increases.
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