تولید گیاهی نانو ذرات نقره توسط گیاه دارویی بومادران

 Background: Nanotechnology is a principally attractive area of research related with production of nanoparticles of variable sizes, shapes, chemical compositions, dispersity and their possible application for human being benefits. Creation, manipulation and utilization of metallic nanoparticles, because of reduction of materials dimensions, affect the physical properties and results in displaying extraordinary thermal, optical and electronic properties of nonmaterial. The biological approaches to synthesis of nanoparticles are better than chemical and physical procedures because of low energy and time expenditure. This method requires no toxic solvents and no dangerous material for environment. Green synthesis of nanoparticles is an eco-friendly method and uses natural solvent. Methods: In this study, the extract of Achillea wilhelmsii as the reducing agent, is used for the biosynthesis of silver nanoparticles. By adding silver nitrate in concentration of 20 mM to extract, the reaction did at room temperature and the color changed from pale yellow to dark showed the silver nanoparticles were generated. Results: The formation of silver nanoparticles was confirmed by the presence of an absorption peak at 450 nm using spectrophotometer. The size and shape of silver nanoparticles were monitored using scanning electron microscopy that shape of particles was spherical and average size of them was about 110 nm. Precise size and change range of nanoparticles measured by Particle Size Analysis (PSA) between 39-226 nm. Conclusions: In this study, silver nanoparticles were produced with an eco-friendly biologic approach and without using any harmful chemical.