The calculated average crystalline size from XRD studies of the synthesized selenium nanoparticles was found to be 88.89 nm which was in accordance with the TEM analysis while the SAED pattern has disclosed hexagonal ring structure with diffraction ring pattern.MTT assay was performed to evaluate the radio-sensitizing effect of selenium nanoparticles under the X-ray influence against cancer as well as healthy cell lines.
Ag<sup>0</sup>-Tb<sup>3+</sup>-SNs are able to image cancer (Hep-2) cells in confocal microscopy measurements due to efficient cell internalization, which is confirmed by TEM images of the Hep-2 cells exposed by Ag<sup>0</sup>-Tb<sup>3+</sup>-SNs.