In the current study, biogenic selenium nanoparticles (Se-NPs) were extracellularly synthesized by Penicillium citrnium. Se-NPs were structurally and morphologically characterized by using analytical techniques such as: X-ray diffraction (XRD), UV-Vis spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR) and transmission electron microscopy (TEM). Maximum UV absorbance was obtained at 255 n...