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.
|Number of pages||5|
|Publication status||Published - 2012 May 21|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics