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Cubic (Mg,Zn)O Nanowire Growth Using Catalyst-Driven Molecular Beam Epitaxy

Published online by Cambridge University Press:  03 March 2011

Y.W. Heo ,
L-C. Tien  and
D.P. Norton
Y.W. Heo
Affiliation:
Kyungpook National University, Department of Inorganic Materials Engineering, Daegu 702-701, Korea
L-C. Tien
Affiliation:
University of Florida, Department of Materials Science and Engineering, Gainesville, Florida 32611
D.P. Norton
Affiliation:
University of Florida, Department of Materials Science and Engineering, Gainesville, Florida 32611
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Abstract

We report on the growth of Mg-rich cubic (Mg,Zn)O nanowires using a catalysis-driven molecular-beam-epitaxy method. Nanowires were grown on both Si and Al2O3 substrates coated with a nominally 2-nm-thick layer of Ag. The (Mg,Zn)O nanowires were grown with a Zn and Mg cation flux, with an O2/O3 mixture serving as the oxidizing species. The growth temperature was 400 °C. Under these conditions, nanowires were observed to grow on the Ag sites. The nanowire diameter was on the order of 90 nm. (Mg,Zn)O nanowires as long as 2 μm were realized. High-resolution transmission electron microscope imagery shows the nanowires had single-phase cubic rock salt structure (Mg,Zn)O with a growth direction along the [100]. The presence and compositional distribution of Mg and Zn in the single nanowire were confirmed using a compositional line-scan, profiled across the nanowire, by energy dispersive spectrometry with scanning transmission electron microscopy.

Keywords

Molecular beam epitaxy (MBE)NanoscaleScanning electron microscopy (SEM)
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 11 , November 2005 , pp. 3028 - 3033
Copyright
Copyright © Materials Research Society 2005

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References

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