Aligned hexagonal coaxial-shaped ZnO nanocolumns on steel alloy by thermal evaporation

A. Umar, Y. B. Hahn

Research output: Contribution to journalArticlepeer-review

168 Citations (Scopus)

Abstract

Single-crystalline, hexagonal coaxial-shaped ZnO nanocolumns have been synthesized in a large quantity on steel alloy substrate via catalyst-free thermal evaporation of metallic zinc powder at 490 °C. The optical-phonon E2 mode at 437 cm-1 in Raman spectrum and a strong UV emission at 381 nm in photoluminescence spectrum showed that the synthesized ZnO nanocolumns have a good crystal quality, with a wurtzite hexagonal phase and exhibited a good optical property. A layer-by-layer three-step growth mechanism was proposed for the formation of hexagonal coaxial-shaped ZnO nanocolumns.

Original languageEnglish
Article number173120
JournalApplied Physics Letters
Volume88
Issue number17
DOIs
Publication statusPublished - 2006

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