used green tea extract as reducing and stabilizing agent to produce gold silver nanoparticles in aqueous solution at ambient conditions.
Furthermore, Kalishwaralal et al. (2008) reported the synthesis
of AgNPs by reduction of aqueous Ag+ ions with the culture
supernatant of Bacillus licheniformis. The synthesized AgNPs
are highly stable and this method has advantages over other
methods as the organism used here is a nonpathogenic
bacterium.