Synthesis, characterization and antimicrobial activity of Abelia grandiflora assisted AgNPs

Abstract

In past few years, wide applicability of silver nanoparticles (AgNPs) in various field attract for an approach of rapid, cost effective and eco-friendly synthesis of AgNPs that is expanding research toward biological methods. The biosynthesised AgNPs were confirmed visually by appearance of dark brown color formation in mixture and silver surface plasmon resonance band observed at 413 nm by using UV-Visible Spectroscopy. The micrograph obtained by SEM and TEM confirmed the formation of AgNPs of 10-30 nm range. The X-ray Diffraction affirmed the crystalline nature of particles with a face centered cubic structure. The AgNPs exhibited the antimicrobial activity against Gram negative bacteria (Gram (-) Bacteria) and Gram positive bacteria (Gram (+) Bacteria) (Escherichia coli-MTCC-443, Staphylococcus aureus-MTCC-3381, Bacillus subtilis-MTCC No.10619, Proteus vulgaris-MTCC 1771, Klebsiella pneumonia-MTCC No 7028 and Bacillus megaterium-MTCC No. 2412). A. grandiflora may be used for the green synthesis of ultra-fine nanoparticles of silver for their antimicrobial activities.