Edge effects on the characteristics of uranium diffusion on graphene and graphene nanoribbons
Cheng Cheng1, †, , Han Han1, Ren Cui-Lan1, 2, Wang Chang-Ying1, 3, Shao Kuan1, Huai Ping1, ‡,
       

Optimized structures of U adsorbed on graphene: (a) top site, (b) bridge site, (c) hollow site. The brown atoms denote carbon atoms in the super cell and the blue atoms represent the U atom.