Figure 1

TEM micrographs of BEL-7402 exposed for 24 h to the different MNPs. (A) TEM micrographs of cell endocytosis; (A1) the enlargement of the rectangular areas on the corresponding images on the left side; (B) untreated cells; (C) cells exposed 0.5 mg/mL Fe₃O₄ MNPs; (D) cells exposed 0.5 mg/mL OA- Fe₃O₄ MNPs; (E) cells exposed 0.5 mg/mL C-Fe MNPs. Red circles show MNPs in the BEL-7402 cells.