Fig. 8

Confocal microscopy images of CD-FeAC NPs treatment in HeLa cells (a) and fresh HeLa cells (b) and where is fluorescent image in upper-left panel, bright field image in upper-right panel, and overlapped image in bottom-left panel, and c cross-sectioned transmission electron microscopy (TEM) image of FeAC NPs treatment in HeLa cells. In b, the arrows and red dotted circles indicate the boundary of cell membrane and the uptaken FeAC NPs, respectively, in a single HeLa cell