Tunable Synthesis of Cuprous and Cupric Oxide Nanotubes from Electrodeposited Copper Nanowires
Polycrystalline copper oxide nanostructures with different valence/oxidation states (i.e., Cu2O and CuO) were readily synthesized by thermal oxidation of single crystalline copper nanowires at relative low operating temperature (200 to 300 °C). Operating temperature of 200 to 250 °C in air oxidized copper to Cu2O and further increased temperature (i.e., 300 °C) led to form CuO nanostructures. The morphology of nanostructures significantly altered from nanowires to nanotubes which might be attributed to Kirkendall effect. The electrical resistivity of single copper nanowire, Cu2O and CuO nanotube were determined to be 3.4 × 10−4, 33, and 211 Ω cm, respectively.
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Document Type: Research Article
Publication date: February 1, 2011
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