中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1669-1673.doi: 10.1088/1674-1056/18/4/065

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Spontaneous formation of single crystal ZnO nanohelices

武祥1, 曲凤玉1, 蔡伟2   

  1. (1)College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; (2)School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2008-08-13 修回日期:2008-09-12 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    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

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)   

  1. 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
  • Received:2008-08-13 Revised:2008-09-12 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    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

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摘要： 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 11] 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.

关键词: nanohelix, thermal evaporation, ZnO, growth mechanism

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.

Key words: nanohelix, thermal evaporation, ZnO, growth mechanism

中图分类号:  (Methods of micro- and nanofabrication and processing)

  • 81.16.-c
81.07.-b (Nanoscale materials and structures: fabrication and characterization) 68.37.Lp (Transmission electron microscopy (TEM))