Majid Sharifi Rad, Javad Sharifi Rad3, Gholam Ali Heshmati, Abdolhossein Miri and Dhrubo Jyoti Sen
Biological synthesis of nanoparticles by the use of natural solvents and it’s natural protecting method was compared with physical and chemical methods. Among of biological synthesis of nanoparticles methods, using of plant and particularly medical plants are more important. Synthesis of silver and gold nanoparticles may be influenced directly or indirectly by phytochemicals in plants such as flavonoids, diosgenin and phenolics compounds. In this study the extracts of dry fruit was used for biological synthesis of gold and silver nanoparticles as a reducing agent. Salt of these elements was added to extract with 1mM concentration and the reaction was performed at room temperature. Change color in plant extract after its reaction with gold and silver salts and peak absorption in 550 and 450nm for gold and silver respectively using spectrophotometer showed that gold and silver nanoparticles was produced. Then size and morphology of these nanoparticles was determined by electronic microscope. The shape of particles was circle and the average particle size was 20-30 and 70-100nm for gold and silver respectively.
