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Tapered ZnO Whiskers: {hkil}-Specific Mosaic Twinning VLS Growth from a Partially Molten Bottom Source

Huang, Bang-Hao and Shen, Pouyan and Chen, Shuei-Yuan (2009) Tapered ZnO Whiskers: {hkil}-Specific Mosaic Twinning VLS Growth from a Partially Molten Bottom Source. Nanoscale Research Letters, 4 (6). pp. 503-512.

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Official URL: http://www.springerlink.com/content/jx073q88672082...

Abstract

Zn particulates overlaid with wurtzite (W)-type ZnO condensates having nearly orthogonal {1011} and {1121} facets were found to self-catalyze unusual tapered W-ZnO whiskers upon isothermal atmospheric annealing, i.e., thermal oxidation, at 600°C. Analytical electron microscopic observations indicated that such whiskers formed tapered slabs having mosaic {1011} and {2111} twinned domains. The tapered whiskers can be rationalized by an alternative vapor-liquid-solid growth, i.e., {hkil}-specific coalescence twinning growth from the ZnO condensates taking advantage of a partially molten bottom source of Zn and the adsorption of atoms at the whisker tips and ledges under the influence of capillarity effect. The tapered whiskers having strong photoluminescence at 391 nm and with a considerable flexibility could have potential applications.

Item Type:Article
Subjects:Physical Science > Nano objects
Material Science > Nanostructured materials
ID Code:5529
Deposited By:IoN
Deposited On:22 May 2009 15:40
Last Modified:22 May 2009 15:40

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