期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 29, 期 1, 页码 195-200出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2008.06.002
关键词
Nitrides; Nanowires; Sublimation method; Optical properties
资金
- National Natural Science Foundation of China [60571029, 50672088]
- Zhejiang Provincial Natural Science Foundation [Z605131]
Hexagonal aluminum nitride (AlN) nanowires were fabricated by direct sublimation method without a catalyst layer. The obtained nanowires have diameters of about 30-100 nm and length up to tens of micrometers. TEM observation indicates that these nanowires are single-crystalline and grow along [0 0 0 1] direction. It is thought that vapor-solid (VS) mechanism should be responsible for the growth of AlN nanowires. In addition, room temperature Raman scattering and photoluminescence spectra from AlN nanowires were studied. Photoluminence spectrum of the AlN nanowires shows a wide emission band centered of 517 and 590 nm, which is related to N vacancies and the transition from the level of V-N(+) to ground state of the deep level Of [V-Al(3-) + 3O(N)(+)] defects, respectively. (c) 2008 Elsevier Ltd. All rights reserved.
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