Journal
CHEMPHYSCHEM
Volume 4, Issue 2, Pages 131-138Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.200390022
Keywords
electrochemistry; electrodeposition; nanowires; metals; sensors
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We describe two related methods for preparing arrays of nanowires composed of molybdenum, copper, nickel, gold, and palladium. Nanowires were obtained by selectively electrodepositing either a metal oxide or a metal at the step edges present on the basal plane of highly oriented pyrolytic graphite (HOPG) electrodes. If a metal oxide was electrodeposited, then nanowires of the parent metal were obtained by reduction at elevated temperature in hydrogen. The resulting nanowires were organized in parallel arrays of 100-1000 wires. These nanowires were long (some >500 mum), polycrystalline, and approximately hemicylindrical in cross-section. The nanowire arrays prepared by electrodeposition were also portable. After embedding the nanowires in a polymer or cyanoacrylate film, arrays of nanowires could be lifted off the graphite surface thereby facilitating the incorporation of metal nonowire arrays into devices such as sensors.
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