Abstract
We report the use of the fungus Fusarium semitectum, isolated from soil from Saudi Arabia, for the extracellular synthesis of silver nanoparticles using silver nitrate solution. Highly stable and crystalline silver nanoparticles were produced in solution by treating the filtrate of the fungus F. semitectum with an aqueous silver nitrate solution. The nanoparticles were characterized by UV-Vis spectrophotometry, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). These analyses revealed that the particles ranged in size from 5 to 35 nm and were mostly spherical in shape. Interestingly, the colloidal suspensions of silver nanoparticles were stable for many weeks.