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Preparation of CdTe nanostructures with different crystal structures and morphologies

Published online by Cambridge University Press:  06 March 2012

Yan Ma ,
Jikang Jian ,
Rong Wu ,
Yanfei Sun  and
Jin Li
Yan Ma
Affiliation:
Department of Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China
Jikang Jian
Affiliation:
Department of Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China, and Research Central for Material Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China
Rong Wu
Affiliation:
Department of Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China, and Research Central for Material Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China
Yanfei Sun
Affiliation:
Department of Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China, and Research Central for Material Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China
Jin Li*
Affiliation:
Department of Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China, and Research Central for Material Physics, XinJiang University, Urumqi 830046, Xinjiang, PR China
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

CdTe nanorods and various branched nanostructures with different crystal structures were have successfully prepared via the catalyst-assisted vacuum thermal evaporation (CVTE) technique using various experimental parameters. SEM and XRD studies were carried out on the as-prepared CdTe nanostructures. The results show that the morphologies and crystal structures of the products were strongly influenced by the growth conditions and the mole ratios of Bi and CdTe. In the high mole ratio (0.08:1) of Bi and CdTe, CdTe branched nanostructures of CdTe were obtained, while nanorods of CdTe were formed at a lower mole ratio of 0.05:1. The crystal structure of products is either Zinc blende or a two-phase mixture of zinc blende and wurtzite. The content of the wurtzite phase were found to increase with increasing growth temperature. Our results also reveal that high growth temperature tends to form the wurtzite phase, and stacking faults may exist in materials grown in higher temperatures. These nanostructures grow following the vapor–liquid–solid (VLS) mechanism.

Keywords

CdTenanostructureszinc blendewurtzitethermal evaporation
Type
Technical Articles
Information
Powder Diffraction , Volume 26 , Supplement S1 , December 2011 , pp. S47 - S50
Copyright
Copyright © Cambridge University Press 2011

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