Figure 6

Confocal images. Confocal images of HeLa cells after incubated 24 h with different kinds of modified NPs at the same concentration 0.1 mg/ml; the nuclei were stained by DAPI (blue), and all of the NPs are labeled by rhodamine B (red). (a) Incubated with pure NPs; (b) incubated with FA-NPs; (c) incubated with mPEG-NPs; (d) incubated with mPEG-FA-NPs.