The effect of annealing on the electrical and thermal transport properties of macroscopic bundles of long multi-wall carbon nanotubes

R. Jin; Z. X. Zhou; D. Mandrus; I. N. Ivanov; G. Eres; J. Y. Howe; A. A. Puretzky; D. B. Geohegan

doi:10.1016/j.physb.2006.06.135

The effect of annealing on the electrical and thermal transport properties of macroscopic bundles of long multi-wall carbon nanotubes

R. Jin, Z. X. Zhou, D. Mandrus, I. N. Ivanov, G. Eres, J. Y. Howe, A. A. Puretzky, D. B. Geohegan

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Electrical resistivity, thermal conductivity and thermoelectric power were measured on macroscopic bundles of long multi-wall carbon nanotubes (CNTs) in the temperature range between 2 and 300 K. While the electrical resistivity shows relatively small variation, the thermal conductivity is significantly enhanced and thermoelectric power changes sign from positive to negative after the samples are annealed in Ar at 2800 °C. Although the latter can be attributed to the adsorbed oxygen on the CNTs that is reduced through the annealing process, our results suggest the studied properties, especially thermal conductivity, are sensitive to the sample crystallinity that can be significantly improved by high-temperature annealing as well.

Original language	English
Pages (from-to)	326-330
Number of pages	5
Journal	Physica B: Physics of Condensed Matter
Volume	388
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physb.2006.06.135
State	Published - Jan 15 2007

Funding

We would like to thank B.C. Sales for fruitful discussions and Nidia Gallego for technical assistance. Research sponsored by the Office of Basic Energy Sciences, U.S. Department of Energy, under contract DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and operated by UT-Battelle LLC.

Funders	Funder number
Office of Basic Energy Sciences
UT-Battelle LLC
U.S. Department of Energy	DE-AC05-00OR22725
Oak Ridge National Laboratory

Keywords

Annealing effect
Carbon nanotubes
Electrical resistivity
Sign change
Thermal conductivity
Thermoelectric power

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10.1016/j.physb.2006.06.135

Cite this

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title = "The effect of annealing on the electrical and thermal transport properties of macroscopic bundles of long multi-wall carbon nanotubes",

abstract = "Electrical resistivity, thermal conductivity and thermoelectric power were measured on macroscopic bundles of long multi-wall carbon nanotubes (CNTs) in the temperature range between 2 and 300 K. While the electrical resistivity shows relatively small variation, the thermal conductivity is significantly enhanced and thermoelectric power changes sign from positive to negative after the samples are annealed in Ar at 2800 °C. Although the latter can be attributed to the adsorbed oxygen on the CNTs that is reduced through the annealing process, our results suggest the studied properties, especially thermal conductivity, are sensitive to the sample crystallinity that can be significantly improved by high-temperature annealing as well.",

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AU - Jin, R.

AU - Zhou, Z. X.

AU - Mandrus, D.

AU - Ivanov, I. N.

AU - Eres, G.

AU - Howe, J. Y.

AU - Puretzky, A. A.

AU - Geohegan, D. B.

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AB - Electrical resistivity, thermal conductivity and thermoelectric power were measured on macroscopic bundles of long multi-wall carbon nanotubes (CNTs) in the temperature range between 2 and 300 K. While the electrical resistivity shows relatively small variation, the thermal conductivity is significantly enhanced and thermoelectric power changes sign from positive to negative after the samples are annealed in Ar at 2800 °C. Although the latter can be attributed to the adsorbed oxygen on the CNTs that is reduced through the annealing process, our results suggest the studied properties, especially thermal conductivity, are sensitive to the sample crystallinity that can be significantly improved by high-temperature annealing as well.

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The effect of annealing on the electrical and thermal transport properties of macroscopic bundles of long multi-wall carbon nanotubes

Abstract

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Keywords

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