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Spontaneous formation of single crystal ZnO nanohelices |
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| Authors: | Wu Xiang Cai Wei and Qu Feng-Yu |
| Affiliation: | College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China; 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 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. |
| Keywords: | nanohelix thermal evaporation ZnO growth mechanism |
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