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Thermoelectric Properties of Single-Wall Carbon Nanotubes

Published online by Cambridge University Press:  10 February 2011

L. Grigorian ,
G. Sumanasekera  and
P. C Eklund
L. Grigorian
Affiliation:
Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506–0055, lgrigor@pop.uky.edu, gamini@monica.gws.uky.edu, eklund@pop.uky-edu
G. Sumanasekera
Affiliation:
Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506–0055, lgrigor@pop.uky.edu, gamini@monica.gws.uky.edu, eklund@pop.uky-edu
P. C Eklund
Affiliation:
Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506–0055, lgrigor@pop.uky.edu, gamini@monica.gws.uky.edu, eklund@pop.uky-edu
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Abstract

Results of the temperature dependence of the thermoelectric power and fourprobe resistance of single wall carbon nanotube mats are presented. The data are interpreted in terms of the response of a percolating network of metallic nanotube bundles. To the best of our knowledge, the work represents the first systematic study of the transport properties of a series of samples prepared using different transition metal-Y growth catalysts. Although x-ray diffraction and Raman scattering data indicate these samples are nominally the same, we find that the identity of the catalyst has a pronounced effect on the electrical transport properties. The data are interpreted qualitatively in terms of a dilute Kondo system involving the coupling of the the localized magnetic moments of impurity atoms (derived from the catalyst), and the conduction electron spins in the nanotube walls.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 545: Symposium Z – Thermoelectric Materials 1998 - The Next Generation… , 1998 , 303
Copyright
Copyright © Materials Research Society 1999

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