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Multicolor photoluminescent graphene quantum dots (GQDs) with a uniform size of ∼60 nm diameter and 2-3 nm thickness were prepared by using unsubstituted hexa-peri-hexabenzocoronene as the carbon source. This result offers a new strategy to fabricate monodispersed GQDs with well-defined morphology.
Liu et al. (Tue,) studied this question.