Marzieh Rostami - Department of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, Islamic republic of Iran
Fereshteh Jookar Kashi - Department of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, Islamic republic of Iran.

Background and Aim : Silver nanoparticles are among the most widely used nanoparticles, and their synthesis has become very common today. Various physical, chemical, and biological methods are used to synthesize these nanoparticles. The biological method is preferable to the other two methods due to its environmental compatibility and low cost. Various studies have shown that different strains of bacteria can regenerate silver ions and convert them into silver nanoparticles. In this study, the reduction of silver ions to silver nanoparticles has been studied by novel strain isolated from the Choghart iron mine.Methods : Biosynthesis of silver nanoparticles was optimized using biomass of bacterial strain isolated from the mine. Finally, ultraviolet-visible spectrophotometer, FTIR, and XRD analysis were used to study the synthesized silver nanoparticles in more detail.Results : Biosynthesis of silver nanoparticles was confirmed by changing the color of silver nitrate solution to dark brown at a concentration of ۳ mM, in the presence of light, the existence of a maximum absorption at ۴۳۷ nm using the spectrophotometer and XRD results. Conclusion : The results showed that the efficiency and rate of silver nanoparticles synthesis would increase with increasing the amount of bacterial biomass and the amount of light emitted into the solution.

Nanoparticles, Silver nanoparticles, Biosynthesis, Bacteria