Molecular dynamics of aluminum nanoparticles friction on graphene

Abstract

Using molecular dynamics method and CUDA-technology for software creation, we investigate tribological properties observed when aluminum atoms are deposited on a graphene layer. During the modeling of the shear of nanoparticles, consisting of aluminum atoms, various parameters are measured the total momentum of the system, the total and potential energies, the temperature, the velocity and position of the center of mass, the dimensions of the nanoparticle, friction and substrate forces acting on the particle. We make a conclusion that tribological properties of nanoparticles strongly depend on materials. Detected heterogeneous form of dependence of substrate force is saw-like. The power dependence of averaged friction force on contact area was obtained. Since peaks of radial distribution function are blurred consequently nanoparticle has amorphous or polycrystalline form.