The effect of dissolution of Copper in acidic electrolyte on the formation of nanowin in Copper electrodeposition

Nanotwinned copper, which has higher strength and relatively low resistivity compensation, is fabricated by pulsed electrodeposition. In order to identify the formation mechanism of nanotwinned copper, we suggest new critical factor, dissolution effect. Off-time and pH are changed to investigate the effects of Cu dissolution in electrolyte on the density of nanotwin. It is confirm that the dissolution of Cu during the nucleation is significantly important to determine the amount of nanotwin, and the rate of dissolution could be controlled by using reverse pulse deposition.