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Issue 10, 2012
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Controlled transformation of ZnO nanobelts into CoO/Co3O4 nanowires

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Abstract

Highly crystalline CoO and Co3O4 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 CoCl2 at 700 °C in Ar, which were subsequently converted to Co3O4 nanowires by oxidative annealing at 600 °C. The reactions at 500 and 550 °C in 0.5% O2 led to the formation of well-defined oxide p–n junction nanostructures such as Co3O4-decorated ZnO nanobelts and ZnO–ZnCo2O4 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.

Graphical abstract: Controlled transformation of ZnO nanobelts into CoO/Co3O4 nanowires

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Publication details

The article was received on 15 Dec 2011, accepted on 01 Feb 2012 and first published on 02 Feb 2012


Article type: Paper
DOI: 10.1039/C2CE06681E
Citation: CrystEngComm, 2012,14, 3737-3741
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    Controlled transformation of ZnO nanobelts into CoO/Co3O4 nanowires

    C. W. Na, H. Woo, H. Kim, U. Jeong, J. Chung and J. Lee, CrystEngComm, 2012, 14, 3737
    DOI: 10.1039/C2CE06681E

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