X.Y. Fan

Fabrication, structure, magnetic properties of highly ordered cobalt disulfide nanowire arrays

Highly ordered arrays of parallel CoS2 nanowires with a diameter of about 50 nm and a length up to about 50μm were synthesized by two electrical fields in an anodized aluminum oxide film. In this letter, fabrication, structure, magnetic properties of highly ordered magnetic cobalt disulfide nanowires arrays were studied. Also, a growth mechanism has been speculated.

Structure and Properties of Cobalt Disulfide Nanowire Arrays Fabricated by Electrodeposition

Highly ordered arrays of parallel cobalt disulfide nanowires with a diameter of about 40 nm and a length up to several tens of micrometers were synthesized by two electrical fields in an anodized aluminum oxide film. The cobalt disulfide nanowires have a cubic pyrite structure. In the study of electrochemical properties, it is found that the reaction of cobalt disulfide is an intercalation reaction in the range of 1.6-3.0 V, while a redox reaction in the range of 0.02-1.6 V is probable. The CoS 2 nanowires are ferromagnetic and the easy magnetization direction is along the nanowire axes.

Characterization of the single crystalline iron sulfide nanowire array synthesis by pulsed electrodeposition

Magnetic material Fe7S8 nanowire arrays have been successfully synthesized by pulsed electrodeposition in porous anodized aluminum oxide template. X-ray diffraction results show that the as-synthesized nanowires are single crystalline and have a highly preferential orientation. Scanning electron microscopy and transmission electron microscopy observations indicate that the ordered Fe7S8 nanowire arrays are uniform with a diameter of 50nm and length up to several tens of micrometers. The temperature variation of the magnetic properties has also been studied.