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Theoretical determination of the necessary conditions for the formation of ZnO nanorings and nanohelices

Z. C. Tu, Q. X. Li, X. Hu

cond-mat.mtrl-sciarXiv:cond-mat/0507321

Abstract

The formation of ZnO nanorings and nanohelices with large polar surfaces observed in experiments [Nano Lett. 3, 1625 (2003); J. Am. Chem. Soc. 126, 6703 (2004)] is shown to be a result of the competition between elastic energy, spontaneous polarization-induced surface energy, volume energy, and defect-induced energy. It is found that nanorings and nanohelices observed in experiments are stable and energetically favorable structures.

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