Density-controlled growth of ZnO nanowires via nanoparticle-assisted pulsed-laser deposition and their optical properties

Ruiqian Guo, Jun Nishimura, Masato Matsumoto, Mitsuhiro Higashihata, Daisuke Nakamura, Tatsuo Okada

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Vertically aligned ZnO nanowires with controllable density were successfully synthesized by nanoparticle-assisted pulsed-laser deposition (NAPLD), by which nanoparticles formed in the gas phase by the condensation of the ablated species are transported onto the substrate, and nanoparticles play an important role in density control. The effects of synthesis conditions on the density and optical properties of ZnO nanowires were investigated in detail. With the increase in repetition rate and laser energy, ZnO nanowires with a higher density can be obtained as a result of a larger quantity of nanoparticles formed in the gas phase. The density-controlled growth also depends on substrate-target distance. UV emission was observed from all the obtained nanowires at about 390 nm without visible fluorescence near 500nm due to their excellent crystallinity and the oxygen-deficient defect.

Original languageEnglish
Pages (from-to)741-745
Number of pages5
JournalJapanese journal of applied physics
Volume47
Issue number1 PART 2
DOIs
Publication statusPublished - Jan 22 2008

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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