Aligned growth of ZnO nanowires by NAPLD and their optical characterizations

Ruiqian Guo, Masato Matsumoto, Takafumi Matsumoto, Mitsuhiro Higashihata, Daisuke Nakamura, Tatsuo Okada

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Not only vertically aligned ZnO nanowires but also horizontally aligned ZnO nanowires have been successfully grown on the annealed (0 0 0 1) c-cut and (1 1 2 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 390 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 390 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.

Original languageEnglish
Pages (from-to)9671-9675
Number of pages5
JournalApplied Surface Science
Volume255
Issue number24
DOIs
Publication statusPublished - Sep 30 2009

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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