Fabrication of Structurally Tailored Cobalt Nanowires

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we report an interesting observation of effecting structural transition of electrochemically deposited cobalt nanowires with change in aspect ratio of the nanowires. This change can be controlled by the deposition temperature. These nanowires were deposited in PCT polycarbonate template single side coated with silver from an optimized CoSO4.7H2O bath (50mM) and subsequently their crystal structure were studied using X‐Ray Diffraction. At room temperature (303K) change in the aspect ratio (length to diameter) of the nanowires brought in a change in their crystal structure from hexagonal close packing (HCP) to face centered cubic (FCC) as we kept on increasing their aspect ratio by varying the deposition time from 200 to 1000 seconds. Rate of deposition for a fixed bath concentration was studied and using that a critical aspect ratio for the conversion was calculated which came out to be approximately 40. This interesting finding has useful bearing in designing the magnetic behavior and switching characteristics of the wires for device applications

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Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Published: June 13, 2011
Pages: 123 - 125
Industry sector: Advanced Materials & Manufacturing
Topic: Advanced Materials for Engineering Applications
ISBN: 978-1-4398-7139-3