▎ 摘　　要

NOVELTY - Preparing graphene on diamond (111) surface, comprises: (i) placing the substrate on the substrate support in the cavity of a filament chemical vapor deposition system and growing a diamond intermediate layer; (ii) growing boron doped diamond film on the diamond intermediate layer; and (iii) annealing and self organizing to form graphene. USE - The method is useful for preparing graphene on diamond (111) surface. ADVANTAGE - The grown graphene area has a higher controllability and can reach to over millimeter scale, additionally, the graphene formed on boron-doped diamond substrate is easier to produce energy gap due to a plurality of advantages of diamond and the asymmetry of boron-doped diamond substrate, therefore more conducive for applying graphene in devices. The sample prepared has a larger size which is from nanometer scale to mu m scale even to millimeter scale. The method is simple.