▁to ▁contract ▁the ▁lattice ▁constant ▁by ▁about ▁ 2 . 0 %. ▁ ▁Vari ants ▁Part ial ▁hydro gen ation ▁leads ▁to ▁hydro gen ated ▁graph ene ▁rather ▁than ▁( fully ▁hydro gen ated ) ▁graph ane . ▁Such ▁comp ounds ▁are ▁usually ▁named ▁as ▁" graph ane - like " ▁structures . ▁Graph ane ▁and ▁graph ane - like ▁structures ▁can ▁be ▁formed ▁by ▁electro ly t ic ▁hydro gen ation ▁of ▁graph ene ▁or ▁few - layer ▁graph ene ▁or ▁high - orient ed ▁py ro ly t ic ▁graph ite . ▁In ▁the ▁last ▁case ▁mechanical ▁ex fol iation ▁of ▁hydro gen ated ▁top ▁layers ▁can ▁be ▁used . ▁ ▁H ydro gen ation ▁of ▁graph ene ▁on ▁substr ate ▁affect s ▁only ▁one ▁side , ▁pres erving ▁hex ag onal ▁symmetry . ▁One - s ided ▁hydro gen ation ▁of ▁graph ene ▁is ▁possible ▁due ▁to ▁the ▁existence ▁of ▁r ipp lings . ▁Because ▁the ▁latter ▁are ▁distributed ▁randomly , ▁the ▁obtained ▁material ▁is ▁dis ordered ▁in ▁contrast ▁to ▁two - s ided ▁graph ane . ▁Anne aling ▁allows ▁the ▁hydro gen ▁to ▁dis per se , ▁rever ting ▁to ▁graph ene . ▁Sim ulations ▁revealed ▁the ▁underlying ▁kin etic ▁mechanism . ▁ ▁D ens ity ▁functional ▁theory ▁calculations ▁suggested ▁that ▁hydro gen ated ▁and ▁flu or in ated ▁forms ▁of ▁other ▁group ▁IV ▁( Si , ▁Ge ▁and ▁Sn ) ▁ ▁n anos he ets ▁ ▁present ▁ ▁properties ▁similar ▁to ▁graph ane . ▁ ▁Pot ential ▁applications