Regular microcoiled carbon fibers with a double helix structure have been synthesized by the catalytic pyrolysis of acetylene at using Ni powder as a catalyst and thiophene as a promotor. The measurements by a standard four-probe technique of resistance, curves, and magnetoresistance of a single microcoiled fiber are presented. curves and the temperature dependence of the resistance are in accordance with Mott-David [Electronic Processes in Noncrystalline Materials (Oxford University Press, Oxford, 1979), 2nd ed., p. 32] variable range hopping above and Shklovskii-Efros [Electronic Properites of Doped Semiconductors (Springer, Berlin, 1984), p. 202]; Pollak-Shklovshii [Hopping Transport in Solids, (North-Holland, Amsterdam, 1991), 273] variable range hopping below . In addition, a positive magnetoresistance with -dependence behavior is observed at low temperature.
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9 October 2006
Research Article|
October 13 2006
Electrical properties of a single microcoiled carbon fiber
Jiaoyan Shen;
Jiaoyan Shen
a)
Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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Zhaojia Chen;
Zhaojia Chen
b)
Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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Nanlin Wang;
Nanlin Wang
Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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Wenjun Li;
Wenjun Li
Technical Institute of Physics and Chemistry
, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
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Lijuan Chen
Lijuan Chen
Technical Institute of Physics and Chemistry
, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
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Jiaoyan Shen
a)
Zhaojia Chen
b)
Nanlin Wang
Wenjun Li
Lijuan Chen
Beijing National Laboratory for Condensed Matter Physics,
Institute of Physics
, Chinese Academy of Sciences, Beijing 100080, People’s Republic of Chinaa)
Electronic mail: [email protected]
b)
Author to whom correspondence should be addressed; electronic mail: [email protected]
Appl. Phys. Lett. 89, 153132 (2006)
Article history
Received:
May 26 2006
Accepted:
August 30 2006
Citation
Jiaoyan Shen, Zhaojia Chen, Nanlin Wang, Wenjun Li, Lijuan Chen; Electrical properties of a single microcoiled carbon fiber. Appl. Phys. Lett. 9 October 2006; 89 (15): 153132. https://doi.org/10.1063/1.2360932
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