Green synthesis of gold nanoaprticles using black tea extract and their effect on the morphology and their antibacterial activity

Herbal extract stabilized green synthesis of nanoparticles is an alternative reducing agent for chemical synthesis. In this manuscript, gold (AuNPs) has been performed using aqueous black tea. The effect tea concentration on the morphology particles was studied. Formation, functional groups, crystalline phase, and changes were characterized by UV-Vis spectrophotometer, Fourier transforms spectrometer, X-ray diffraction pattern (XRD), scanning electron microscope (SEM), energy dispersive (EDS), transmission microscopy (TEM) coupled with selected area diffraction. Antibacterial activity AuNPs studied against bacteria. It found that as increased, shape changed finally became spherical at high concentrations. results research reveal antibacterial AuNPs.