“…Inside, the covalent modification of graphene is much reliable to apply in the future electronic device, in contrast with the physisorption of chemical species. Graphene halide [4,5], one of graphene derivative including fluoride [6,7], chloride [8,9], bromide [10][11][12] and iodide [12,13], have been recently investigated for the band gap engineering. Among them, graphene chloride is a p-doping type covalent modification of graphene which could tailor the intrinsic properties of graphene [14,15].…”