From bulk materials to nanoparticles using a one-step electrochemical method.

ABSTRACT

This paper describes an electrochemical method which permits us to transform solid metals (cobalt, iron or nickel) into nanoparticles. An electrolysis cell is made, the anode being a metal bar and the cathode a mercury layer. Magnetic nanoparticles are obtained in one step by electroreduction of mercury. Electrolysis is performed in an aqueous medium at pH above 6 in order to avoid the reduction of protons. The magnetic nanoparticles obtained are kept in mercury and can be recovered in an organic solvent.