Preparations of Nickel, Cobalt, and Iron Nanoparticles through the Rapid Expansion of Supercritical Fluid Solutions (RESS) and Chemical Reduction

A method based on the rapid expansion of supercritical fluid solutions (RESS) coupled with chemical reduction was developed to produce nickel, cobalt, iron, and iron oxide nanoparticles of reasonably narrow size distributions. Under the protection of a polymer stabilization agent, the largely amorphous metal nanoparticles form stable suspensions in room-temperature solvents.