Spontaneous formation of single crystal ZnO nanohelices
Wu Xiang(武祥)a)†, Cai Wei(蔡伟)b), and Qu Feng-Yu(曲凤玉)a)
a College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; b School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Abstract This paper reports a novel helix-like ZnO nanostructure with several tens of nanometres in thickness synthesized on a gold-coated Si substrate by thermal evaporation of zinc sulfide powder at 1020°C. Transmission electron microscope characterization shows that as-synthesized ZnO nanohelices extend along [01$\bar{1}$1] direction and the axial direction of the helix is along [0001] direction. A catalyst-intervened dislocation-induced growth mechanism has been suggested to explain the formation of the helix-like ZnO nanostructures. This study opens a new route to construct helix-like ZnO nanostructures by different evaporation sources.
Received: 13 August 2008
Revised: 12 September 2008
Accepted manuscript online:
PACS:
81.16.-c
(Methods of micro- and nanofabrication and processing)
Fund: Project supported by National Key
Basic Research Project (Grant No 2003CB716900), Doctor Start-up Fund
of Harbin Normal University (Grant No KGB200802), Natural Science
Foundation of Heilongjiang Province (Grant No B2007-2), and the
Science Technology and
Cite this article:
Wu Xiang(武祥), Cai Wei(蔡伟), and Qu Feng-Yu(曲凤玉) Spontaneous formation of single crystal ZnO nanohelices 2009 Chin. Phys. B 18 1669
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