Fig. 2From: Fabrication of Fullerene Anchored Reduced Graphene Oxide Hybrids and Their Synergistic Reinforcement on the Flame Retardancy of Epoxy ResinXPS spectra of GO, PEI-rGO and C60-PEI-rGO (a), and the N1s XPS spectrum of PEI-rGO (b), and C60-PEI-rGO (c)Back to article page