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Synthesis and Electronic Properties SWCNT Sheets

Published online by Cambridge University Press:  01 February 2011

David Lashmore,
Brian White,
Mark Schauer and
Jenn Mann
David Lashmore
Affiliation:
dlashmore@nanocomptech.com, Nanocomp, R&D, 162 Pembroke, Concord, NH, 03301, United States, 603 442 8992
Brian White
Affiliation:
bwhite@nanocomptech.com, Nanocomp, R&D, 162 Pembroke, Concord, NH, 03301, United States
Mark Schauer
Affiliation:
mschauer@nanocomptech.com, Nanocomp, R&D, 162 Pembroke, Concord, NH, 03301, United States
Jenn Mann
Affiliation:
jmann@nanocomptech.com, Nanocomp, R&D, 162 Pembroke, Concord, NH, 03301, United States
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Abstract

The commercial synthesis of carbon nanotube sheets will be described. This process involves the following steps: chemical vapor deposition of long CNTs from mixed hydrocarbon type fuels, creation and stabilization of the catalyst, and a large textile forming device. Movies of the growth process will be presented and described. Further the electronic properties of these textiles will be presented and discussed as: (1) A function of temperature from −4 °K to 500 °C, (2) A function frequency from 0 up to about 30 GHz and (3) In a magnetic field up to 1000 Oe. It is shown that these yarns have semiconductor properties but surprisingly exhibit apparent metallic like conduction high at high frequencies. The thermoelectric behavior of the textiles (and yarns) made of this material will be discussed as will the applications in secondary batteries. A power level of up to three watts per gram for the thermoelectric material has been demonstrated.

Keywords

electronic materialnanoscaleC

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References

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