In this study, silver nanoparticles were synthesized by various plant extracts as a green synthesis method. The extracts of 4 pharmaceutical plants belonging to Zagros region of Ilam named as Crocus Haussknechtii , Lavandula Angustifolia , Ocimum Basilicum and Mint have been used. The effects of temperature and pH on nanoparticles synthesis process has been investigated and significant effects of these two factors on synthesis has been found. The alkaline environment with pH level greater than 9 greatly affects the nanoparticles synthesis. Relative optimal conditions for different extracts have been determined.
