Single-Crystal Nanorings Formed by Epitaxial Self-Coiling of Polar Nanobelts

Xiang Yang Kong, Yong Ding, Rusen Yang, Zhong Lin Wang

Research output: Contribution to journalArticlepeer-review

1478 Scopus citations


Freestanding single-crystal complete nanorings of zinc oxide were formed via a spontaneous self-coiling process during the growth of polar nanobelts. The nanoring appeared to be initiated by circular folding of a nanobelt, caused by long-range elactrostatic interaction. Coaxial and uniradial loop-by-loop winding of the nanobelt formed a complete ring. Short-range chemical bonding among the loops resulted in a single-crystal structure. The self-coiling is likely to be driven by minimizing the energy contributed by polar charges, surface area, and elastic deformation. Zinc oxide nanorings formed by self-coiling of nanobelts may be useful for investigating polar surface-induced growth processes, fundamental physics phenomena, and nanoscale devices.

Original languageEnglish (US)
Pages (from-to)1348-1351
Number of pages4
Issue number5662
StatePublished - Feb 27 2004


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