Thermoelectric power properties of graphitic nanotubule bundles

Mingliang Tian; Lin Chen; Fanqing Li; Ruiping Wang; Zhiqiang Mao; Yuheng Zhang; Hisashi Sekine

doi:10.1063/1.366161

Thermoelectric power properties of graphitic nanotubule bundles

Mingliang Tian, Lin Chen, Fanqing Li, Ruiping Wang, Zhiqiang Mao, Yuheng Zhang, Hisashi Sekine

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Abstract

Thermoelectric power (TEP) properties of graphite nanotubule bundles were measured in the range 80-280 K. It was found that the TEP is positive and the magnitude at 280 K reaches about an order of +15 μV/K, far larger than that in highly oriented pyrolytic graphite. Moreover, in the studied range, the TEP can be approximately described by the formula S(μV)=0.167T-(70.2 +0.085T)e^-302.5/T derived based on a two-band model. The experimental results support such an idea that in the buckybundles both kinds of nanotubes, i.e., metallic tubes with a highly mobile velocity and semiconductive tubes with a narrow energy gap are included. The Fermi energy of the valence band for the metallic tubes is about -0.22 eV, and the average effective energy gap of the semiconductive tubes is estimated at about 52.2 meV. This conclusion is in good agreement with the theoretical predictions.

Original language	English (US)
Pages (from-to)	3164-3166
Number of pages	3
Journal	Journal of Applied Physics
Volume	82
Issue number	6
DOIs	https://doi.org/10.1063/1.366161
State	Published - Sep 15 1997

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.366161

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@article{20865b426f18459eb2f94abb6f2dc789,

title = "Thermoelectric power properties of graphitic nanotubule bundles",

abstract = "Thermoelectric power (TEP) properties of graphite nanotubule bundles were measured in the range 80-280 K. It was found that the TEP is positive and the magnitude at 280 K reaches about an order of +15 μV/K, far larger than that in highly oriented pyrolytic graphite. Moreover, in the studied range, the TEP can be approximately described by the formula S(μV)=0.167T-(70.2 +0.085T)e-302.5/T derived based on a two-band model. The experimental results support such an idea that in the buckybundles both kinds of nanotubes, i.e., metallic tubes with a highly mobile velocity and semiconductive tubes with a narrow energy gap are included. The Fermi energy of the valence band for the metallic tubes is about -0.22 eV, and the average effective energy gap of the semiconductive tubes is estimated at about 52.2 meV. This conclusion is in good agreement with the theoretical predictions.",

author = "Mingliang Tian and Lin Chen and Fanqing Li and Ruiping Wang and Zhiqiang Mao and Yuheng Zhang and Hisashi Sekine",

year = "1997",

month = sep,

day = "15",

doi = "10.1063/1.366161",

language = "English (US)",

volume = "82",

pages = "3164--3166",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "6",

}

TY - JOUR

T1 - Thermoelectric power properties of graphitic nanotubule bundles

AU - Tian, Mingliang

AU - Chen, Lin

AU - Li, Fanqing

AU - Wang, Ruiping

AU - Mao, Zhiqiang

AU - Zhang, Yuheng

AU - Sekine, Hisashi

PY - 1997/9/15

Y1 - 1997/9/15

N2 - Thermoelectric power (TEP) properties of graphite nanotubule bundles were measured in the range 80-280 K. It was found that the TEP is positive and the magnitude at 280 K reaches about an order of +15 μV/K, far larger than that in highly oriented pyrolytic graphite. Moreover, in the studied range, the TEP can be approximately described by the formula S(μV)=0.167T-(70.2 +0.085T)e-302.5/T derived based on a two-band model. The experimental results support such an idea that in the buckybundles both kinds of nanotubes, i.e., metallic tubes with a highly mobile velocity and semiconductive tubes with a narrow energy gap are included. The Fermi energy of the valence band for the metallic tubes is about -0.22 eV, and the average effective energy gap of the semiconductive tubes is estimated at about 52.2 meV. This conclusion is in good agreement with the theoretical predictions.

AB - Thermoelectric power (TEP) properties of graphite nanotubule bundles were measured in the range 80-280 K. It was found that the TEP is positive and the magnitude at 280 K reaches about an order of +15 μV/K, far larger than that in highly oriented pyrolytic graphite. Moreover, in the studied range, the TEP can be approximately described by the formula S(μV)=0.167T-(70.2 +0.085T)e-302.5/T derived based on a two-band model. The experimental results support such an idea that in the buckybundles both kinds of nanotubes, i.e., metallic tubes with a highly mobile velocity and semiconductive tubes with a narrow energy gap are included. The Fermi energy of the valence band for the metallic tubes is about -0.22 eV, and the average effective energy gap of the semiconductive tubes is estimated at about 52.2 meV. This conclusion is in good agreement with the theoretical predictions.

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 6

ER -

Thermoelectric power properties of graphitic nanotubule bundles

Abstract

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