Characteristically shaped ZnO particles produced by periodic precipitation in organic gel media

Tetsuo Kawano, Hiroaki Imai

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Wurtzite-type ZnO particles were directly prepared in agar gel containing zinc sulfate by diffusion of hydroxyl ions (OH-). A banded structure consisting of characteristically shaped particles, such as star-like, ellipsoidal, and round grains, was obtained through periodic precipitation along the direction of the OH- diffusion. The individual particles were composed of nanoscale ZnO crystallites elongated in the c-axis. The star-like and ellipsoidal ZnO aggregates were produced through a dissolution-precipitation process from previously precipitated thin plates of ZnSO4· 3Zn(OH)2. The gel media provided a diffusion field of the precursors resulting in the formation of various kinds of characteristic shapes consisting of nanoscale ZnO particles.

Original languageEnglish
Pages (from-to)490-499
Number of pages10
JournalJournal of Crystal Growth
Issue number3-4
Publication statusPublished - 2005 Oct 1


  • A1. Crystal growth
  • A1. Liesegang bands
  • A1. Periodic precipitation
  • B1. Agar gel
  • B1. Zinc oxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


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