Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 16, Issue 30, Pages 3075-3083Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b603442j
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Multigram quantities of Cu nanowires ca. 25 nm in diameter and mm in length have been produced by AC electrodeposition into porous aluminium oxide ( PAO) templates. Multiple, large-area Al electrodes (5 x 11 cm or 10 x 25 cm) are anodized in parallel at 25.0 V in 0.3 M H2SO4(aq) using custom built baths. The pores are efficiently filled by applying 200 Hz sine waves at 10 V-rms between the anodized Al and Cu plate counter electrodes immersed in a 0.50 M CuSO4(aq) solution. Dissolution of the PAO template in 0.6 M H3PO4 to free the Cu nanowires results in significant coarsening of the nanowires, whereas dissolution of the PAO template in 1.0 M NaOH( aq) results in retention of the Cu nanowire diameters corresponding to the pore diameter of the PAO template. Liberated Cu nanowires were characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy.
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