Full printed electronics:preparation new materials nano-copper in conductive ink

Copper nanoparticles were successfully prepared by reduction method using potassium borohydride as reducing agent,copper sulfate as oxidant,polyethylene glycol as dispersant. XRD and TEM results showed that single crystal,spherical,diameter of 30~50 nm nano-copper was obtained with ethylene glycol as the solvent and with polyethylene glycol as dispersant,other oxide can not be detected. The effect solvent and dispersant on the synthesis of nano-copper was studied. It is showed that the organic solvents could significantly prevent the oxidation of the nano-copper. The polyethylene glycol dispersant could increase dispersion and uniformity of the nano-copper particle.