A novel one pot synthesis of super stable silver nanoparticles using natural plant exudate from azadirachta indica (Neem Gum) and their inimical effect on pathogenic microorganisms

摘要

The biological synthesis of stable silver nanoparticles (SNPs) is reported using Azadirachta indica plant exudate (Neem gum). The SNPs were characterized by means of UV-Visible Spectroscopy, High Resolution Transmission Electron Microscopy and X-ray diffraction. The UV-visible spectra exhibited a sharp peak at 439 nm suggesting the formation of spherical nanoparticles. This was further confirmed by Transmission Electron Micrographs which displayed nanoparticles in the size range of 15-20 nm. The X-ray Diffraction of SNPs synthesized using neem gum exhibited 2θ values assigned to that of silver nano crystals. The SNPs showed anti-microbial activity against E. coli and S. aureus.