Patent ID: 9011706
Filing Date: 2015-04-21
Classification: B82Y

Abstract:
1. A method of making a porous microstructure, the method comprising: preparing an electrodeposition solution containing ions of nickel and ions of copper; immersing an electrically conducting substrate as a working electrode, and an electrically conducting metal wire in the electrodeposition solution as a counter electrode; immersing a reference electrode in the electrodeposition solution; applying a sine wave voltage having a period of 400 seconds and varying in magnitude between −0.885 volts and −0.850 volts, between the working electrode and the reference electrode, and depositing a multilayer film of nickel and copper on the substrate; and after electrodepositing the multilayer film of nickel and copper on the substrate, removing copper from the multilayer film of nickel and copper in the electrodeposition solution by applying a voltage of 0.5 volts between the working electrode and the reference electrode to produce the porous microstructure including pores having sizes in a range from 50 nm to 200 nm, and a periodicity of about 50 nm along a thickness direction of the porous microstructure.