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. 2022 Jan 25;8(1):9. doi: 10.1007/s40828-021-00159-6

Fig. 4.

Fig. 4

A Uptake of NPs over time in presence of NPs in the extracellular medium, and B loss of NPs over time when free NPs had been removed from the extracellular medium, both as functions of the NP concentration CNP. The absolute amounts of (i) intracellular NPs and (ii) NPs in the extracellular medium are reported. Image take with permission from Liu et al. [26]. These data were obtained with HeLa cells and Eu- and Bi-doped GdVO4 NPs of around 35 nm core diameter, coated with the polymer polyacrylic acid (PAA)