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Chin. Phys. B, 2009, Vol. 18(4): 1669-1673    DOI: 10.1088/1674-1056/18/4/065

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.
Keywords:  nanohelix      thermal evaporation      ZnO      growth mechanism  
Received:  13 August 2008      Revised:  12 September 2008      Accepted manuscript online: 
PACS:  81.16.-c (Methods of micro- and nanofabrication and processing)  
  81.07.-b (Nanoscale materials and structures: fabrication and characterization)  
  68.37.Lp (Transmission electron microscopy (TEM))  
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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