Controlled growth of ZnO torch-like nanostructure arrays by Jing Xiao, Wei Zhang, Yue Wu, and Hui Sun

Crystal Research and Technology

Cryst. Res. Technol. 43, 634 (2008) - Abstract -

Controlled growth of ZnO torch-like nanostructure arrays

Jing Xiao, Wei Zhang, Yue Wu, and Hui Sun

Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, 100871, P. R. China

Keywords	nanostructures, growth model, oxides, semiconducting II-VI materials
PACS	61.46.+w, 81.05.Dz, 81.10.Bk
DOI	10.1002/crat.200811128

Single-crystal ZnO torch-like nanostructure arrays were synthesized using a simple two-step pressure controlled thermal evaporation method without any catalyst. The nanostructures had a hierarchical morphology, with well-hexagonal faceted holders and needle-like flames on them. The diameter of each single flame was about 20-40 nm at the base and 10 nm at the tip. Both the holders and flames were found to grow along the [0001] direction. The morphology of the structures could be effectively controlled by varying the growth temperature and vacuum pressure. The experimental results and analysis provided easy strategies to control the morphology of nanostructures and also enhanced the understanding of the growth mechanism.

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