توليد زيستي نانو ذرات طلا توسط گونه اي از باكتري رودوكوكوس ( hodococcus sp ) جدا شده از خاك معدن مس شهر اهر

Biosynthesis of gold nanoparticles by Rhodococcus speciess isolated from Ahar copper mine (Iran)

Nanobiotechnology is a novel science in the fields of industry, medicine and biology. Nanoparticles especially gold nanoparticles are subjected to have several applications in diagnosis and therapy of cancer. Ever increasing pressure to develop env ironmentally benign nanoparticle synthesis has lead to an interest in biotransformations as a route to growth of nanoscale structures. In this study, we have investigated biosynthesis of gold nanoparticles using Rhodococcus. sp isolated from Ahar copper mine (in north-west of Iran). The results showed the intracellular/ extracellular synthesis of gold nanoparticles by reaction of 1 mM aqueous HAuC14 incubated at pH 7 after 24 h with Rhodococcus. Sp. The UV-vis and XRD of the bacterial as well as chemical prepared Au NPs were recorded. Transmission electron microscopy (TEM) micrograph showed the formation of gold nanoparticles with average size of 50 nm.