▎ 摘　　要

NOVELTY - Functionalized graphene nanoplatelet comprises functional molecules, functional vapor, and graphene platelets. The functional molecules: comprises 6-30C aromatic hydrocarbon or heterocyclic ring substituted with a polar functional group; and forms non-covalent bonding between the functional molecules and the graphene platelets. USE - Used functionalized graphene nanoplatelet. ADVANTAGE - The graphene nanoplatelet is simple to produce. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) producing functionalized graphene nanoplatelet, comprising (a) producing a first dispersion comprising a graphene nanoflurry, functional molecules, and first solvent, and (b) mechanically milling the first dispersion, and vaporizing the graphene nanoplatelet with the functional molecules; and (2) separating size of functionalized graphene nanoplatelet, comprising (i) producing at least two functionally vaporized graphene nanoplatelet of different sizes, (ii) producing a second dispersion comprising the functionalized graphene nanoplatelet and a second solvent, and (iii) adding a salt aqueous solution into the second dispersion to obtain a precipitate, where at least two types salt aqueous solutions having different concentrations are sequentially added to obtain least two type precipitates having different sizes.