Fig. 3
Quantitative and qualitative analysis of cellular uptake of GNPPEG-RGD. a, b Quantification of NP uptake per cell and per unit volume of the cell. c–e Darkfield images of HeLa, FBs, and CAFs, respectively. f–h Spectra collected from GNP clusters localized within the cells and from background in HeLa, FBs, and CAFs, respectively. Experiments were repeated three times (n = 3) and the data presented is the average. The error bars represent standard error. Scale bar = 20 μm