Journal
MATERIALS LETTERS
Volume 137, Issue -, Pages 68-71Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2014.08.120
Keywords
Zinc oxide; Hierarchical structure; Nanocrystalline materials; X-ray techniques
Funding
- National Natural Science Foundation of China [61161008]
- Natural Science and Technology Foundation of Yunan Province [2009CD015]
- Graduate Student Scientific Innovation Research Project of Yunnan University [YNUY201393]
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Wurtzite ZnO with six-fold-symmetry hierarchical architecture was successfully fabricated by a simple sonochemical method at 40 degrees C. The structure and the morphology of the hierarchical ZnO characterized by X-ray diffraction spectra, scanning electron microscopy, transmission electron microscopy and high-resolution show that hierarchical ZnO is assembled with six nanorods arrays, standing perpendicular to a central axis of prism ZnO nanorods. The nanorod arrays epitaxially grow on the side face of the central ZnO nanorod with a 6-fold symmetry. A formation mechanism of hierarchical ZnO is also proposed in the paper. Ostwald-ripening assisted oriented attachment plays a crucial role in the growth behavior. (C) 2014 Elsevier B.V. All rights reserved.
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