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TEM images of ultrathin sections of HepG2 cells exposed to MSNs-Tf-AgNPs. Control cells (A), HepG2 cells exposed to 25 μg/mL for 24 h (B and C) and 50 μg/mL for 48 h (D and E) of MSNs-Tf-AgNPs. EDX analysis of treated cells (F). Arrows indicate the localization of MSNs.
