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TEM investigation of nucleation and initial growth of ZnSe nanowires

Published online by Cambridge University Press:  01 February 2011

Y. Cai ,
S. K. Chan ,
I. K. Sou ,
Y. F. Chan ,
D. S. Su  and
N. Wang
Y. Cai
Affiliation:
Physics Department and the Institute of Nano Science and Technology, the Hong Kong University of Science and Technology, Hong Kong, China
S. K. Chan
Affiliation:
Physics Department and the Institute of Nano Science and Technology, the Hong Kong University of Science and Technology, Hong Kong, China
I. K. Sou
Affiliation:
Physics Department and the Institute of Nano Science and Technology, the Hong Kong University of Science and Technology, Hong Kong, China
Y. F. Chan
Affiliation:
Physics Department and the Institute of Nano Science and Technology, the Hong Kong University of Science and Technology, Hong Kong, China
D. S. Su
Affiliation:
Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4–6, D-14195 Berlin, Germany
N. Wang
Affiliation:
Physics Department and the Institute of Nano Science and Technology, the Hong Kong University of Science and Technology, Hong Kong, China
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Abstract

Single crystalline ZnSe nanowires were fabricated on GaAs substrates by molecular beam epitaxy technique via Au-catalyzed vapor-liquid-solid reaction. The nucleation and initial growth of the nanowires were investigated by high-resolution transmission electron microscopy. It was revealed that Au catalysts initially reacted with the substrate forming binary AuGa2 alloy droplets. The sizes of the catalysts determined the growth direction of ZnSe nanowires. A model based on the surface energies of the nanowire nuclei was proposed to explain the size dependence of growth direction for ZnSe nanowires.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 838: Symposium O – Scanning Probe and Other Novel Microscopies of Local Phenomena in Nanostructured Materials , 2004 , O14.11
Copyright
Copyright © Materials Research Society 2005

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References

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