Antimicrobial activity and characterization of biosynthesized silver nanoparticles from Anisochilus carnosus

Abstract

Silver nanoparticles with size of 6- 57nm were synthesized by bioreduction method from <em>Anisochilus carnosus </em>aqueous and ethanolic extract<em>. </em>Biosynthesized nanoparticles showed maximum antimicrobial activity against <em>K. pneumonia</em> (13±1.67mm), <em>E.coli</em> (13±1.97mm) and <em>B</em>. <em>subtilis</em> (13±1.07mm) followed by <em>P. aeruginosa </em>and minimum against <em>S. aureus</em>. The quantitative formation, characteristics and impurities of silver nanoparticles were studied using UV-Vis absorption spectroscopy, X-ray diffraction analysis, EDX spectrum, scanning electron microscopy (SEM) analysis. Based on this investigation these silver nanoparticles may be used in effluent treatment process for reducing the microbial load.