Formation of double-side teethed nanocombs of ZnO and self-catalysis of Zn-terminated polar surface

Chang Shi Lao, Pu Xian Gao, Ru Sen Yang, Yue Zhang, Ying Dai, Zhong L. Wang

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94 Scopus citations

Abstract

Polar surface induced asymmetric growth of single-side teethed ZnO nanocombs was attributed to the self-catalysis of the Zn-terminated (0 0 0 1) surface (Z.L. Wang, X.Y. Kong, J.M. Zuo, Phys. Rev. Lett. 91 (2003) 185502). In this Letter, nanocombs of ZnO with double-sided teeth have been observed. This symmetric growth of the fish-ribbon like teeth has been identified due to the existence of an inversion domain boundary along the ribbon, so that both side surfaces of the ribbon are terminated with the chemically active Zn-(0 0 0 1) plane. A model is also given about the formation of ∼110° double-sided nanocombs based on the nucleus composed of multiply twinned pyramids. The data show that the Zn-terminated (0 0 0 1) surface is responsible for the formation of the teeth, while the oxygen-terminated (0001̄) surface is chemically inactive and does not grow teeth.

Original languageEnglish (US)
Pages (from-to)358-362
Number of pages5
JournalChemical Physics Letters
Volume417
Issue number4-6
DOIs
StatePublished - Jan 10 2006

Bibliographical note

Funding Information:
Thanks to Jun Zhou, Jin Liu and Justin Hwa’s for their help in the synthesis experiments. Thanks the support from NSF, the NASA Vehicle Systems Program and Department of Defense Research and Engineering (DDR&E), and the Defense Advanced Research Projects Agency (Award No. N66001-04-1-8903).

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