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The preparation and tribological properties tests of modified graphene (MG) and modified graphene oxide (MGO). (a,b) Modified graphene (MG) and modified graphene oxide (MGO) were prepared using alkyl imidazolium ionic liquids by electrochemical exfoliation and solvent exfoliation, respectively. (c) Schematic of tribological properties tests of MGO and MG. Reproduced with permission from reference Fan et al. [92], Copyright 2015, Elsevior.
