▎ 摘　　要

We report the atmospheric thermal oxidation of chemical vapor deposition (CVD)-grown graphene and its effect on the wrinkles in graphene. Heating CVD-grown single-layer graphene in air at 550 degrees C leads to the disappearance of the wrinkles and the formation of nanoscale cracks and pits in the basal plane. Under this reaction condition, the wrinkles were not preferentially attacked by O-2, which we attribute to the relaxation of wrinkles as well as the presence of more reactive point defects and grain boundaries in the basal plane. Randomly stacked two-layer graphene was found to be more stable toward oxidation than was single-layer graphene.