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Silicon Carbide Nanowire Heterostructures Constructed from Released Iron Catalysis

Published online by Cambridge University Press:  01 February 2011

Zhenyu Liu ,
Vesna Srot ,
Peter A. van Aken ,
Manfred Rühle  and
Judith C. Yang
Zhenyu Liu
Affiliation:
[email protected], University of Pittsburgh, Department of Mechanical Engineering and Materails Science, 848 Benedum Hall, Pittsburgh, PA, 15261, United States
Vesna Srot
Affiliation:
[email protected], Max-Planck-Institute for Metals Research, Heisenbergstrasse 3, Stuttgart, 70569, Germany
Peter A. van Aken
Affiliation:
[email protected], Max-Planck-Institute for Metals Research, Heisenbergstrasse 3, Stuttgart, 70569, Germany
Manfred Rühle
Affiliation:
[email protected], Max-Planck-Institute for Metals Research, Heisenbergstrasse 3, Stuttgart, 70569, Germany
Judith C. Yang
Affiliation:
[email protected], University of Pittsburgh, Department of Mechanical Engineering and Materials Science, 848 Benedum Hall, Pittsburgh, PA, 15261, United States
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Abstract

Herein, we present the capability of creating silicon carbide (SiC) nanowires and branched nanostructures via a released cataltic process. Core-shell structured carbon-encapsulated iron nanoparticles were used as catalysts for SiC nanostructures formations by vapor-solid reaction. Various SiC nanostructures, including SiC nanocones, biaxial SiC-SiC composite nanowires, SiC-Fe-SiC junctions, Y, T branched SiC nanowires, and other complex heterostructures were observed from this process. It was demonstrated that the encapsulated iron could gradually migrate out of the carbon shell, and the released iron nanoparticles catalyzes the SiC nanostructures formation. Their morphologies and microstructures were investigated by different techniques, including scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM), and their formation mechanisms are proposed.

Keywords

nanostructuretransmission electron microscopy (TEM)x-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1058: Symposium JJ – Nanowires–Novel Assembly Concepts and Device Integration , 2007 , 1058-JJ04-02
Copyright
Copyright © Materials Research Society 2008

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References

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