Fig. 7From: Polyethylenimine-CO2 adduct templated CaCO3 nanoparticles as anticancer drug carrierEndocytosis of various CaCO3 nanoparticles. A Flow cytometry showed HeLa cells endocytosed more FA-grafted particles. B Fluorescence staining revealed both particles and the released Ca2+ ions located in lysosomes. Scale bars: 25 μm. C Dynamic change of local Ca2+ fluorescent intensity after incubation with PEI-CO2@CaCO3-PEG-FA particles. Scale bar: 10 μm Back to article page