Electrochemical fabrication of arrayed alumina nanowires showing strong blue emission
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Arrayed alumina nanowires having controlled uniform diameters of 30–90 nm and lengths of 2–10 μm have been fabricated electrochemically with a high yield using two-step anodized aluminum oxide membranes as templates. The observed photoluminescence of the arrayed alumina nanowires arising from the emission of F+ and F centers is strong and blue-shifted compared with that of porous alumina membranes due to the structural difference of Al2O3. Our synthesized alumina nanowires are also found to be chemically more stable than the templates.
PACS.73.22.-f Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals 78.55.-m Photoluminescence, properties and materials 76.30.Mi Color centers and other defects
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