Measuring friction from simulations of folded graphene sheets

We run molecular dynamics simulations of folded graphene sheets and present a procedure to measure the sliding friction in these systems based on the rate of decay of a damped-harmonic oscillator. This procedure allowed us to study the affect the size, geometry and the temperature of the graphene sheet had on the ability to propagate the initial fold and the rate at which it settles to a final 'fully-folded' equilibrium state. We offer simple rationalisations for the relationships between the initial geometries of our simulations and the friction values that emerge.