Direct current electro-deposition of binary Co₅₅Ni₄₅ alloy nanorod arrays and its characterization

Highly ordered arrays of binary Co₅₅Ni₄₅ alloy nanorods with Co₅₅Ni₄₅ morphology were prepared by direct current electro-deposition using polycarbonate (PC) membrane template. The transmission electron microscope and scanning electron microscope observations revealed conical morphology of the nanorods. The two ends of nanorod arrays had diameters of 200 nm and 320 nm, respectively, and the nanorod arrays could be as long as 6-7 μm. The diameter of nanorod arrays depended strongly on pore diameter in PC membrane and the lengths were decided by plating parameters such as voltage, pH value, plating time and other deposition parameters. The magnetic properties and mechanism of crystals nucleation and growth in binary Co₅₅Ni₄₅ alloy nanorod arrays were also studied.