Green synthesis of silver and palladium nanoparticles at room temperature using coffee and tea extract

An extremely simple green approach that generates bulk quantities of nanocrystals of noble metals such as silver (Ag) and palladium (Pd) using coffee and tea extract at room temperature is described. The single-pot method uses no surfactant, capping agent, and/or template. The obtained nanoparticles are in the size range of 20–60 nm and crystallized in face centered cubic symmetry. The method is general and may be extended to other noble metals such as gold (Au) and platinum (Pt).

• UD
  U.S. Department of Energy
• UE
  U.S. Environmental Protection Agency
• UO
  University of Texas at Dallas
• OR
  Oak Ridge Institute for Science and Education