Role of VI/II ratio on the growth of ZnO nanostructures using chemical bath deposition

Z. N. Urgessa, O. S. Oluwafemi, J. R. Botha

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1 Citation (Scopus)


In this paper the growth process and morphological evolution of ZnO nanostructures were investigated in a series of experiments using chemical bath deposition. The experimental results indicate that the morphological evolution depends on the reaction conditions, particularly on OH - to Zn 2 ratio (which directly affects the pH). For low VI/II ratios, quasi-spherical nanoparticles of an average diameter 30 nm are obtained, whereas for larger VI/II ratios, nanorods with an average diameter less than 100 nm are produced, which indicates that by systematically controlling the VI/II ratio, it is possible to produce different shapes and sizes of ZnO nanostructures. A possible mechanism for the nanostructural change of the as-synthesized ZnO from particle to rod was elucidated based on the relative densities of H and OH - in the solution.

Original languageEnglish
Pages (from-to)1672-1674
Number of pages3
JournalPhysica B: Condensed Matter
Issue number10
Publication statusPublished - 15 May 2012
Externally publishedYes


  • Nanostructures
  • Self-assembly
  • VI/II ratio
  • ZnO
  • pH

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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