▎ 摘　　要

The performance of graphene nanoporous membranes is determined primarily by nanopores. Thus, the creation of satisfactory nanopores is critical. The direct irradiation of energetic ions is a facile and effective fabrication technology. Here, the dynamic process of structural change in graphene irradiated by swift heavy ions is investigated using molecular dynamics simulation. The results indicate that the structural changes inside and outside the deposition region are different. Inside this region, the atomic stress accumulated during the introduction of energy is large enough to drive the carbon atoms away from the surface, resulting in the formation of a central nanopore. Outside this region, the atomic stress rapidly decreases to be smaller than the intrinsic stress of graphene. Therefore, the lattice fluctuates near the original position as the pressure wave emanates outwards. Between the nanopore and lattice, there is a mesh-like structure composed of many carbon chains.