Synthesis, dispersion, and cytocompatibility of graphene oxide and reduced graphene oxide

► Morphology of GO and RGO. ► Stability of GO and RGO suspensions in dispersants: PEG, DOC, Pluronic 123. ► Influence of the dispersant type, GO, RGO concentration on mammalian cell toxicity. ► PEG as optimal dispersant of GO, RGO in bioapplications.