Figure 5.

Micrographs of the distributions of nuclei and TiO₂ nanoparticles in HeLa cells. (a) the distribution of nuclei (blue), (b) the distribution of TiO₂ nanoparticles (red), (c) DIC micrograph, and (d) the merged image of (a), (b), and (c), in which the violet color denotes the co-localization of TiO₂ nanoparticles with nuclei. The images displayed at the bottom and right side of (d) were the X-Z and Y-Z profiles measured along the lines marked in the main image, showing the 3D distributions of TiO₂ nanoparticles and nuclei.