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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 8
BKCSDE 31(8)
August 20, 2010 

Wire-like Bundle Arrays of Copper Hydroxide Prepared by the Electrochemical Anodization of Cu Foil
Duc Duong La, Sung Yeol Park, Young Wook Choi, Yong Shin Kim*
Cu Anodization, Copper hydroxide, Nanobundle, Nanowire
Nanostructured copper compounds were grown by electrochemical anodization of copper foil in aqueous NaOH under varying conditions including electrolyte concentration, reaction temperature, current density, and reaction time. Their morphology and atomic composition were investigated by using SEM, TEM, XRD, EDS and XPS. At the conditions ([NaOH] = 1 M, 20 oC, 2 mA cm-2), wire-like orthorhombic Cu(OH)2 nanobundles with an average width of 100 - 300 nm and length of 10 μm were synthesized with the preferential [100] growth direction. Furthermore, when the concentration decreased to 0.5 M NaOH, the 1D nanobundle structure became narrower and longer without any change in compositions or crystalline structure. Side reaction pathways appeared to compete with the 1D nanostructure formation channels: the formation of CuO nanoleaves at 50 oC via the sequential dehydration of Cu(OH)2, CuO/Cu2O aggregates in 4 M NaOH, and Cu2O nanoparticles and CuO nanosheets at lower current density.
2283 - 2288
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