Zinc oxide micro- and nanoparticles: Synthesis, structure and optical properties

Latha Kumari, W. Z. Li, Charles H. Vannoy, Roger M. Leblanc, D. Z. Wang

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Zinc oxide (ZnO) spherical nanoparticles (SNPs) and bitter-melon-like (BML) microparticles were synthesized by a hydrothermal route using a zinc (Zn) plate as a source and substrate at various synthesis conditions. The structural analysis confirmed the formation of ZnO with hexagonal wurtzite phase on the hexagonal Zn substrate with growth of the ZnO microparticles along the [1 0 1] direction. The UV-vis absorption spectra of the ZnO microparticles indicated absorption peaks in the UV region which can be attributed to the band gap of ZnO. The room temperature photoluminescence (PL) of the ZnO microparticles exhibited a broad emission band, which is fitted with four Gaussian peaks and were assigned to transitions involving free excitons and various defect centers. The growth model for the formation of ZnO micro- and nanoparticles is presented.

Original languageEnglish (US)
Pages (from-to)190-196
Number of pages7
JournalMaterials Research Bulletin
Volume45
Issue number2
DOIs
StatePublished - Feb 1 2010

Keywords

  • A. Nanostructures
  • A. Optical properties
  • B. Chemical synthesis
  • C. Electron microscopy
  • C. X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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