Non-catalytic growth of high aspect-ratio ZnO nanowires by thermal evaporation

A. Umar, E. K. Suh, Y. B. Hahn

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50 Citations (Scopus)


High-density and high aspect-ratio ZnO nanowires were grown on Si(100) substrates by the thermal evaporation of metallic zinc powder without the use of metal catalysts or additives. The as-grown nanowires had diameters in the range of 60-100 nm with lengths 5-15 μm. Detailed structural characterization indicated that the obtained nanowires are single-crystalline with a perfect hexagonal facet and surfaces. The room temperature PL spectrum exhibited strong UV emission, affirming that the as-grown products have good optical properties. The possible growth mechanism for the formation of hexagonal-faceted and perfect surface ZnO nanowires is also discussed.

Original languageEnglish
Pages (from-to)447-451
Number of pages5
JournalSolid State Communications
Issue number9
Publication statusPublished - Sept 2006


  • A. ZnO nanowires
  • B. Thermal evaporation
  • C. Scanning and transmission electron microscopy
  • D. Structural and optical properties


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