OICC Press Journal of Nanostructure in Chemistry 2193-8865 6 1 (March 2016) 2015 11 24 Biosynthesis of silver nanoparticles using pennyroyal water extract as a green route 10.1007/s40097-015-0176-8 EN Sajjad Sedaghat Department of Chemistry, Faculty of Science, Malard Branch, Islamic Azad University, Tehran, IR Arezoo Esmaeili Agbolag Department of Chemistry, Faculty of Science, Shahryar Branch, Islamic Azad University, Tehran, IR Siamak bagheriyan Department of Chemistry, Faculty of Science, Shahryar Branch, Islamic Azad University, Tehran, IR Journal Article 2015 11 24 Abstract Synthesis of silver nanoparticles (Ag NPs) using water extract of pennyroyal is carried out successfully at ambient temperature. The obtained Ag NPs were characterized, using different methods including ultraviolet–visible spectroscopy, powder X-ray diffraction, scanning electron microscopy and transmission electron microscopy (TEM). TEM study showed that mean diameter and standard deviation for the formation of silver nanoparticles were 19.14 ± 9.791 nm.