Controlled transformation of ZnO nanobelts into CoO/Co 3O 4 nanowires

Chan Woong Na, Hyung Sik Woo, Hyo Joong Kim, Unyong Jeong, Jaiho Chung, Jong Heun Lee

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


Highly crystalline CoO and Co 3O 4 nanowires were prepared by vapor-phase conversion of ZnO nanobelts. The ZnO nanobelts were successfully transformed into highly crystalline CoO nanowires by thermal evaporation of CoCl 2 at 700 °C in Ar, which were subsequently converted to Co 3O 4 nanowires by oxidative annealing at 600 °C. The reactions at 500 and 550 °C in 0.5% O 2 led to the formation of well-defined oxide p-n junction nanostructures such as Co 3O 4-decorated ZnO nanobelts and ZnO-ZnCo 2O 4 core-shell nanocables, respectively, as the reaction intermediates. The evolutions of phase and residual Zn component during the conversion were investigated in relation to the reaction temperature and oxygen partial pressure.

Original languageEnglish
Pages (from-to)3737-3741
Number of pages5
Issue number10
Publication statusPublished - 2012 May 21

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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