Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 22, Pages 6814-6818Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2010.04.094
Keywords
ZnO; Nanostructures; Crystal growth; Photoluminescence
Categories
Funding
- National Natural Science Foundation of China [90406024, 90606001, 20873039]
- Hunan Provincial Natural Science Foundation [07jj4002]
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Novel ZnO tetrapod and multipod nanostructures were successfully synthesized in bulk quantity through thermal evaporation method. The morphologies and structures of the ZnO nanostructures were characterized by scanning electron microscopy, X-ray diffraction and transmission electron microscopy. The results revealed that the ZnO nanostructures consisted of tetrapods and multipods with tower-like legs. The ZnO nanostructures were of high purity and were well crystallized with wurtzite structure. The preferred growth direction of legs was found to be the [0001] direction. Possible growth mechanisms were proposed for the formation of the ZnO nanostructures. Room temperature photoluminescence (PL) spectra showed that the as-synthesized ZnO nanostructures had a strong green emission centered at 495 nm and a weak ultraviolet emission at 383 nm. Raman spectroscopy was also adopted to explore the structural quality of the ZnO nanostructures. (C) 2010 Elsevier B. V. All rights reserved.
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