Fig. 4
From: Polymer coated gold-ferric oxide superparamagnetic nanoparticles for theranostic applications
a Cytotoxicity of PLL–Au–Fe3O4 NPs in BT-474 and MDA-MB-231 cells using live-dead assay at increasing NP concentration; Cellular uptake of PLL–Au–Fe3O4 NPs in b BT-474 and c MDA-MB-231 cells. Arrows indicate the NPs inside cells. Cells without any NP treatment (control) did not show the black NP dots inside cells. Scale bar = 10 μm