Fig 4. Microscopic observation of bPEI and citrate coated NP.

Microscopic images of cells incubated with AgNP-bPEI (Fig 4A) and AgNP-CIT (Fig 4B) for 24 hours. The nuclei were stained with DAPI and the cytoplasm was stained with cell mask orange. The AgNP are represented by the white spots in the darkfield microscopy images. es. Magnification 200x.