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Cellular uptake of γ-Fe2O3/NCDs by PC12 cells; (a) fluorescence intensity measurements from cell cytometry of PC12 cells incubated with γ-Fe2O3/NCDs, ranging from 0.05 to 0.5 mg/mL, for 24 h. (b) Average of fluorescence intensity normalized to control without NCDs upon incubation of the cells with γ-Fe2O3/NCDs.
