ABSTRACT
The discovery of graphane has opened the flood gates to chemical modifications of graphene. The addition of hydrogen atoms to carbon atoms in graphene can generate a new system without damaging the distinctive one-atom-thick construction itself. Graphane, the fully hydrogenated analogue of graphene, was first theoretically proposed by Jo Sofo et al., where its electronic properties could be controlled by adatom adsorption and desorption. The essential properties of hydrogenated graphenes are explored in detail for various H-concentrations and distributions by the first-principles calculations. Hydrogenated graphenes exhibit tunable band gaps and ferromagnetism, and they are potential candidates for hydrogen storage applications. Single-side hydrogenated graphenes have attracted a great deal of attention since they could serve as magnetic materials with ferromagnetic configurations. The single-side hydrogenated graphenes exhibit the ferromagnetic configuration, being different from the anti-ferromagnetic one in zigzag graphene nanoribbons. Hydrogenated graphene materials have potential applications in various fields.
