Substrate effects on ZnO nanostructure growth via nanoparticle-assisted pulsed-laser deposition

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

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The effects of various substrate conditions on the morphology, crystal structure and photoluminescence of ZnO nanostructures synthesized by nanoparticle-assisted pulsed-laser ablation deposition were investigated. It is concluded that the sapphire substrate with a 1 h anneal at 1000 °C is the most favorable to the vertical growth of ZnO nanostructures. SEM analysis indicates that the well-aligned diameter-modulated ZnO nanonails with unique shape were successfully synthesized on the annealed sapphire substrate. The as-synthesized ZnO nanostructures exhibit an ultraviolet emission at around 390 nm and the absent green emission under room temperature, indicating that there is a very low concentration of deep-level defects inside ZnO lattices. The novel ZnO nanostructures could offer novel opportunities for both fundamental research and technological applications.

Original languageEnglish
Pages (from-to)3100-3104
Number of pages5
JournalApplied Surface Science
Volume254
Issue number10
DOIs
Publication statusPublished - Mar 15 2008

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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