Fig. 1

Characterization of the as-obtained multilayer graphene. a The photograph of a bottle of the as-obtained multilayer graphene with a mass of 120 g. b, c The low and high-magnification SEM images of the as-obtained multilayer graphene. d The low magnification TEM image of the as-obtained multilayer graphene. Inset is the corresponding SAED pattern. e The EDX spectrum of the as-obtained multilayer graphene. f The HRTEM image of the as-obtained multilayer graphene. g The AFM image and h corresponding height trace of a single multilayer graphene