Fig. 7. (a) Annexin-V cell viability plot of MDA-MB468 cells by flow cytometry. Cells were treated with either γ-Fe2O3 or ε-Fe2O3 NPs. (b) Fluorescence intensity of ε-Fe2O3 and (c) γ-Fe2O3 NPs coated with a rhodamine copolymer at the indicated concentrations, determined by flow cytometry. (d) Growth inhibition of MDA-MB468 cells measured by MTT reduction assays after 24 hours of culture in the presence of the indicated concentrations of both types of NPs. Data are expressed as mean ± S.D of the mean (n ≥ 3).
