Green Synthesis of Silver Nanoparticles using Aqueous Plant Extracts and its Application as Optical Sensor

Abstract

The syntheses of metal nanoparticles have taken a new route from the emergence of green chemistry. We propose the synthesis of silver nanoparticles through simple bio synthetic method. Metal nanoparticles prepared are characterized by TEM, UV-Vis and FTIR spectroscopy. TEM image show the nanoparticles are nearly spherical in shape with size about 40-50nm. UV-vis spectra show distinct peak of silver at around 427nm corresponding to the surface plasmon peak of silver nanoparticles. The reduction in the surface plasmon peak of silver nanoparticles (Ag NPs) in addition to hydrogen peroxide at increasing concentrations supports our stand that it can be used as an optical sensor. Colorimetric detection of hydrogen peroxide is done with cellulose substrates.