Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5361629 | Applied Surface Science | 2009 | 5 Pages |
Abstract
Not only vertically aligned ZnO nanowires but also horizontally aligned ZnO nanowires have been successfully grown on the annealed (0Â 0Â 0Â 1) c-cut and (1Â 1Â 2Â 0) a-cut sapphire substrates, respectively using catalyst-free nanoparticle-assisted pulsed-laser ablation deposition (NAPLD). The as-synthesized ZnO nanowires exhibit an ultraviolet emission at around 390Â nm and the absent green emission under room temperature. The single ZnO nanowire was collected in the electrode gap by dielectrophoresis (DEP). Under the optical pumping, the single ZnO nanowire exhibited UV emission at around 390Â nm with several sharp peaks whose energy spacings are almost constant, which greatly differs from the broad UV emission of the film with many nanowires, suggesting ZnO nanowires as candidates for laser media. The single ZnO nanowire showed polarized photoluminescence (PL). The as-synthesized ZnO nanowires could find many interesting applications in short-wavelength light-emitting diode (LED), laser diode and gas sensor.
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Authors
Ruiqian Guo, Masato Matsumoto, Takafumi Matsumoto, Mitsuhiro Higashihata, Daisuke Nakamura, Tatsuo Okada,