Temperature-controlled growth of α-Al2O3 nanobelts and nanosheets

Alpha-Al2O3 nanobelts and nanosheets with different morphologies and sizes were successfully synthesised by a simple chemical route from H2O and Al in an Ar atmosphere. SEM and TEM observations show that the as-synthesised alpha-Al2O3 nanostructures consist of nanobelts and nanosheets. The temperatu...

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Bibliographic Details
Published in:Journal of materials chemistry 2003-01, Vol.13 (12), p.3040-3043
Main Authors: FANG, X. S, YE, C. H, PENG, X. S, WANG, Y. H, WU, Y. C, ZHANG, L. D
Format: Article
Language:English
Subjects:
Chemical synthesis methods
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of nanofabrication
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other solid inorganic materials
Photoluminescence
Physics
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Summary:Alpha-Al2O3 nanobelts and nanosheets with different morphologies and sizes were successfully synthesised by a simple chemical route from H2O and Al in an Ar atmosphere. SEM and TEM observations show that the as-synthesised alpha-Al2O3 nanostructures consist of nanobelts and nanosheets. The temperature distribution inside the alumina tube is the critical factor determining the morphologies and sizes of the alpha-Al2O3 nanostructures. Photoluminescence measurements showed a blue luminescence band in the wavelength range of 400-500 nm, which can be attributed to F+ centres in the alpha-Al2O3 nanostructures. The growth of these products is believed to be mainly determined by growth kinetics as well as thermodynamics. 30 refs.
ISSN:0959-9428
1364-5501
DOI:10.1039/b309193g