Biosynthesis and characterization of silver nanoparticles by using green tea leaf extract from Camellia sinensis
S Prabhudas, M Mastan
Green synthesis of silver nanoparticles (AGNPS) is a rapid developing field in Nanotechnology. In this study, we have investigated the AgNPs were biosynthesized from aqueous silver nitrate through a simple and eco-friendly route using Camellia sinensis leaf extracts. Which has a rich source of polyphenolic compounds used for the reduction and capping of silver nanoparticles. The synthesis was carried out for 2 h at room temperature, and the reduction process of Ag+ to Ag0 was observed by the change of color from clear brown to milky grey. Characterization of the silver nanoparticles was performed by using UV-Vis, TEM, FT-IR and XRD. The UV-Vis spectrum of the aqueous medium containing silver nanoparticles showed an absorption peak at around 425 - 435 nm. Well-dispersed silver nanoparticles with an approximate size of 4 nm were observed in the TEM image. FT-IR spectral analysis indicated the tea extract showed the reducing and capping agents on the surface of AgNPs. The XRD analysis shows that the synthesized AgNPs are of face-centered cubic structure. In conclusion of our study, AgNPs plays a major role in the field of nanotechnology and nanomedicine.