Graphene nanospheres and their mechanical and tribological responses

In this simulation study, we have the three main aims as follows: crump the graphene sheets randomly seeded to create the stable nanoparticles of the fine sphere, and investigate the mechanical and tribological responses of the obtained graphene nanospheres. By using this method, we find that such nanospheres can be obtained. These nanospheres can provide the high limitations of the elastic stress and the elastic strain, up to around 263.53 GPa and 73.90 %, at the temperatures up to 3000 K. As used as lubricants, they can provide the ultralow friction for the iron contacts. The obtained results are explained through the observations of density of the nanospheres, the bond among the graphene sheets and their lubrication mechanisms.