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- Title
Surface-morphology evolution of ZnO nanostructures grown by hydrothermal method.
- Authors
Zhang, X. L.; Dai, H. T.; Zhao, J. L.; Wang, S. G.; Sun, X. W.
- Abstract
Surface-morphology evolution of ZnO nanocrystals has been observed by the hydrothermal process. The effects of stirring time and ammonia content on the morphology evolution have been discussed, respectively. Extension of stirring time of the precursor results in morphology transformation from star-like to wire-like ZnO nanocrystals. ZnO nuclei aggregation and uniform Zn(OH)2 precipitation can readily explain these two morphologies, respectively. By increasing the ammonia content in the solution, the morphology of ZnO crystals is transformed from an irregular shape to hexagon sheets to nanorods, and the side length of ZnO crystals is decreased accordingly. Hollow structures are realized at the subsequent solution aging process. Variation of zinc ammonic complex and minimum surface energy can well explain the morphology evolution of ZnO nanostructures.
- Subjects
NANOSTRUCTURES; NANOCRYSTALS; CRYSTALLOGRAPHY; NITROGEN compounds; SURFACE chemistry
- Publication
Crystal Research & Technology, 2014, Vol 49, Issue 4, p220
- ISSN
0232-1300
- Publication type
Article
- DOI
10.1002/crat.201300334