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Synthesis and Microstructures of α-Fe2O3 Bicrystalline Nanowires

Published online by Cambridge University Press:  01 February 2011

R.M. Wang ,
Y.F. Chen ,
Y. Y. Fu ,
H. Zhang  and
C. Kisielowski
R.M. Wang
Affiliation:
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R., China Ernest Orlando Lawrence Berkeley National Laboratory, National Center for Electron Microscopy, University of California, Berkeley, CA 94720
Y.F. Chen
Affiliation:
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R., China
Y. Y. Fu
Affiliation:
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R., China
H. Zhang
Affiliation:
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, P. R., China
C. Kisielowski
Affiliation:
Ernest Orlando Lawrence Berkeley National Laboratory, National Center for Electron Microscopy, University of California, Berkeley, CA 94720
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Abstract

Novel Fe2O3 nanowires have been successfully synthesized by a simple oxidation process of pure iron. The microstructure of the Fe2O3 nanowires have been systematically investigated by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM). The investigated materials are found to be stoichiometric rhombohedral α-Fe2O3 with typical diameters of 20–80 nm and lengths up to 20 μm. In addition to known single crystal Fe2O3 nanowires, a great amount of novel bicrystalline nanowires were found with ellipsoidal heads. Investigations indicate that most of the bicrystalline nanowires are twins and their orientation relationship is obtained to be (−1, 1, 10)M//(−1, 1, 10)T, [110]M//[-1-10]T. High resolution TEM with numerical reconstruction of the electron exit wave was used to investigated the atomic structure of the micro-twins. Their growth mechanism is briefly discussed on the basis of solid phase growth process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 839: Symposium P – Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry, and Structure , 2004 , P6.5
Copyright
Copyright © Materials Research Society 2004

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References

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