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Metal Nanowire Arrays by Electrodeposition
Author(s) -
Walter Erich C.,
Zach Michael P.,
Favier Frédéric,
Murray Benjamin J.,
Inazu Koji,
Hemminger John C.,
Penner Reginald M.
Publication year - 2003
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200390022
Subject(s) - nanowire , materials science , pyrolytic carbon , nanotechnology , highly oriented pyrolytic graphite , metal , palladium , graphite , nickel , electrode , electroplating , oxide , crystallite , molybdenum , chemical engineering , composite material , metallurgy , chemistry , layer (electronics) , catalysis , biochemistry , pyrolysis , engineering
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 μm), 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 nanowire arrays into devices such as sensors.