▎ 摘　　要

NOVELTY - Manufacture of functional graphene involves (a) mixing a carbon-based material, an acid comprising both an amine group and a carboxyl group, acetic acid and a solvent, (b) raising the temperature of the resultant of the mixing step and stirring for at least 8 hours, and (c) cooling the resultant of the stirring step. USE - Manufacture of functional graphene used in semiconductor device, display device, and battery device. ADVANTAGE - The method prevents aggregation of graphene by including acetic acid together with an acid comprising both an amine group and a carboxyl group.