▎ 摘　　要

Nanoparticles are ubiquitously existent on the surface of graphene films prepared by chemical vapour deposition. However, studies that thoroughly explore this phenomenon are still fairly limited. In this work, we have demonstrated that the location of nanoparticles should be a straightforward reflection of the nucleation sites of graphene growth. In addition, the deposition of nanoparticles is consistent with the distribution of multilayer graphene. We have found that nanoparticles are not nucleation seeds as proposed by other groups; instead, they are sediment-like materials similar to the graphene films prepared on copper substrates.