Comparative Analysis of Stable Aqueous Dispersion of Silver Nanoparticle Synthesized from Mangifera Indica and Azadirachta Indica Leaf Extract

Abstract

Mango and neem leaf extract were prepared by soaking the measured leaves into 100ml of distilled water under appropriate conditions. Consequently, biosynthesis of silver nanoparticles was carried out by distinctly adding the mango and neem leaf extract to prepared solution of silver nitrate (AgNO3) to produce aqueous dispersion of silver nanoparticles. The silver nanoparticles produced were investigated using FTIR, UV-Visible and AFM Spectroscopy at 15 minutes, 24 hours and 48 hours respectively. Reduction in OH absorption proves chemical interaction of mango extract with AgNO3. UV/Visible also revealed colour changes from faint yellow to brown to reddish brown within 15 minutes and 24 hours of incubation at room temperature. Atomic Force Microscopy revealed that the sizes of mango-based dispersion are smaller than that of neem-based dispersion.