green synthesis of silver nanoparticles using avena sativa l. extract

objective(s): nowadays, nanoparticles bio production, considering their performance in medicine and biological science, is increasing. green synthesis of metal nanoparticles using organisms has emerged as a nontoxic and ecofriendly method for synthesis of metal nanoparticles the objectives of this study were the production of silver nanoparticles using avena sativa l. extract and optimization of the biosynthesis process. the effects of quantity of substrate (silver nitrate (agno3)) and temperature on the formation of silver nanoparticles are studied. methods: in this work, silver nanoparticles were synthesized from an extract of avena sativa l. at different temperatures (30° c, 60° c, 90° c )  and agno3 concentrations( 1 mm, 2mm, 4mm) . the morphology and size of the nanoparticles were determined using scanning electron microscope (sem) and dynamic light scattering (dls). results: sem images showed that by increasing temperature nanoparticles size were decreased and by increasing concentrations of agno3 the number of nanoparticles was increased. conclusions: the results indicated that by increasing the reaction temperature, the size of the nanoparticles would decrease. also by increasing the concentrations of agno3, the amount of produced nanoparticles would be increased, but won't have a significant effect on its size. the preparation of nano- structured silver particles using avena sativa l. extract provides an environmentally friendly option as compared to currently available chemical/ physical methods.