期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 502, 期 1, 页码 118-122出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.04.042
关键词
ZnO; Zn-ZnO; Chestnut-like; Growth mechanism; Photoluminescence
资金
- National Basic Research Program of China (973 Program) [2010CB933501]
- Innovative Youth Team of Natural Science Foundation of Zhejiang Province [R4090058]
- Ministry of Education of Zhejiang Province [Y200806012]
Large-scale chestnut-like ZnO and Zn-ZnO hollow nanostructures on Si substrates were prepared without catalyst by a one-step chemical vapor deposition technique. The morphology, composition, and phase structure of as-prepared products were characterized by scanning electron microscopy, energy-dispersive X-ray spectrometry, and X-ray diffraction, respectively. The ZnO consists of chestnut-like nanostructures with hollow interior and a lot of nanoneedles aligning on the surface of the hollow structure in a radial way, whereas the Zn-ZnO shows that long nanowires grew on the chestnut-like hollow structure with a hexagonal flower-like structure on the top layer. A vapor-solid (VS) growth mechanism for the chestnut-like ZnO and Zn-ZnO hollow nanostructures was proposed. The photoluminescence (PL) of ZnO and Zn-ZnO shows a large number of oxygen vacancy defects appeared in the novel hollow nanostructures. (C) 2010 Elsevier B.V. All rights reserved.
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