Size-Monodisperse Metal Nanoparticles via Hydrogen-Free Spray Pyrolysis

Abstract

Size-monodisperse pure copper particles (see Figure for a TEM image) are formed from metal salt precursors in a spray pyrolysis process that uses ethanol as co-solvent, thus avoiding the addition of hydrogen or other reducing gases. In addition, the uniform-size particles could be “classified” using a droplet impactor plate, which eliminates larger droplets at the atomizer prior to entering the reactor furnace.