Biosynthesis of silver nanoparticles from Schizophyllum radiatum HE 863742.1: their characterization and antimicrobial activity

Development of reliable and eco-friendly process for synthesis of silver nanoparticles is an important step in the field of application in nanotechnology. One of the options to achieve this objective is to use natural biological processes. They have an advantage over conventional methods involving chemical agents associated with environmental toxicity. This study demonstrates the extra-cellular synthesis of stable silver nanoparticles using the white rot fungus, Schizophyllum radiatum with GenBank Accession no HE 863742.1. The supernatant of the seed media obtained after separating the cells has been used for the synthesis of silver nanoparticles. The morphology and structure of synthesized silver nanoparticles were characterized using FT-IR, XRD, UV-visible spectrum of the aqueous medium containing silver ion showed a peak in the range of 420-430 nm corresponding to the Plasmon absorbance of silver nanoparticles. Scanning electron microscopy micrograph showed formation of well-dispersed silver nanoparticles in the range of 10-40 nm. The effect of different carbon sources and the time taken for formation particles and the anti-microbial activity of synthesized nanoparticles were carried and compared with silver nitrate solution and with standard streptomycin. The process of reduction being extra-cellular and fast may lead to the development of an easy bioprocess for synthesis of silver nanoparticles.