Fig. 5From: FROP-1 peptide-conjugated ultrasmall superparamagnetic nanoparticles as a targeted T1-weighted MR contrast agent for breast cancer: in vitro studyCellular uptake of the (a) Fe3O4 and; (b) Fe3O4@FROP-1 NPs in MCF-7 cell line as analyzed by ICP-MSBack to article page