Applied Physics A

, 93:843 | Cite as

Catalyst-free synthesis of vertically-aligned ZnO nanowires by nanoparticle-assisted pulsed laser deposition

  • R. Q. Guo
  • J. Nishimura
  • M. Matsumoto
  • D. Nakamura
  • T. Okada
Article

Abstract

Vertically aligned ZnO nanowires have been successfully synthesized on c-cut sapphire substrates by a catalyst-free nanoparticle-assisted pulsed-laser ablation deposition (NAPLD) in Ar and N2 background gases. In NAPLD, the nanoparticles formed in the background gas by laser ablation are used for the growth of the nanowires. The surface density of the nanowires can be controlled by varying the density of nanoparticles, which is in turn achieved by varying ablation laser parameters such as the energy and the repetition rate. When single ZnO nanowire synthesized in a N2 background gas was excited by 355 nm laser-pulse with a pulse-width of 8 ns, stimulated emission was clearly observed, indicating high quality of the nanowire.

PACS

81.05.Dz 81.15.Fg 81.07.Bc 78.45.+h 85.60.Jb 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • R. Q. Guo
    • 1
  • J. Nishimura
    • 2
  • M. Matsumoto
    • 2
  • D. Nakamura
    • 2
  • T. Okada
    • 2
  1. 1.Laboratory of Advanced MaterialsFudan UniversityShanghaiChina
  2. 2.Graduate School of ISEEKyushu UniversityFukuokaJapan

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