PNF Co. has developed a equipment based on EEW method to produce metal nano colloids and metal nano powders inside water or any other liquid media as well as chamber with inert gas. In short, EEW or electrical explosion of wire is a synthesis method for metal nano particles that consists of passing a pulse of a high-density current through a wire causing the explosive disintegration of the metal (accompanied by a bright flash of light, a shock wave, the dispersion of the metal, and the fast expansion of a mixture of boiling metal droplets and vapour to the surrounding media) and the production of metal particles with characteristic sizes down to a few nanometers