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High Spatial Resolution Assessment of the Structure, Composition, and Electronic Properties of Nanowire Arrays

Published online by Cambridge University Press:  17 March 2011

M.S. Sander ,
A.L. Prieto ,
Y.M. Lin ,
R. Gronsky ,
A.M. Stacy ,
T.D. Sands  and
M.S. Dresselhaus
M.S. Sander
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720
A.L. Prieto
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720
Y.M. Lin
Affiliation:
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139
R. Gronsky
Affiliation:
Department of Materials Science & Engineering, University of California, Berkeley, CA 94720
A.M. Stacy
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720
T.D. Sands
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720
M.S. Dresselhaus
Affiliation:
On leave from Departments of Physics and Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139
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Abstract

We have employed transmission electron microscopy (TEM) and analytical electron microscopy to perform preliminary assessment of the structure, composition and electronic properties of nanowire arrays at high spatial resolution. The two systems studied were bismuth and bismuth telluride nanowire arrays in alumina (wire diameters ~40nm), both of which are promising for thermoelectric applications. Imaging coupled with diffraction in the TEM was employed to determine the grain size in electrodeposited Bi2Te3 nanowires. In addition, a composition gradient was identified along the wires in a short region near the electrode by energy-dispersive x-ray spectroscopy. Electron energy loss spectroscopy combined with energy-filtered imaging in the TEM revealed the excitation energy and spatial variation of plasmons in bismuth nanowire arrays.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 635: Symposium C – Anisotropic Nanoparticles-Synthesis, Characterization & Applications , 2001 , C4.36
Copyright
Copyright © Materials Research Society 2001

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