Coriandrum sativum seed extract assisted in situ green synthesis of silver nanoparticle and its anti-microbial activity

We have developed a novel method to synthesize silver nanoparticles by mixing silver salt solution with seed extract of C. sativum without using any surfactant or external energy. By this method physiologically stable, bio-compatible Ag nanoparticles were formed which could be used for a variety of applications. With this method rapid synthesis of nanoparticles was observed to occur; i.e. reaction time was 1-2 h as compared to 2-4 days required by microorganisms. TEM images shown reveals that there was poly-disperse spherical particles with nonuniform distribution of nanoparticles in the prepared sample. It was observed that the nanoparticles formed were of different sizes and particle size was found to be 9.94, 13.94, 15.91 and 12.59 nm and the mean size of about 13.09 nm which lies in the nano range.