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

Jin  R; Zhou  ZX; Mandrus  DIvanov  INEres  GHowe  JYPuretzky  AAGeohegan  DB

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

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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 degrees 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. (c) 2006 Elsevier B.V. All rights reserved.

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来源
《Physica, B. Condensed Matter》 |2007年第2期|326-330|共5页
作者
Jin R; Zhou ZX; Mandrus DIvanov INEres GHowe JYPuretzky AAGeohegan DB;
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作者单位

Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA;

Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA;

Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA;

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正文语种英语
中图分类物理学;
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carbon nanotubes; electrical resistivity; thermal conductivity; thermoelectric power; annealing effect; sign change; THERMOELECTRIC-POWER; PREFERRED ORIENTATION; CONDUCTIVITY; FILMS;

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

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