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Advanced Materials

Room Temperature Electrical and Thermal Switching CNT/Hexadecane Composites

Authors

  • P. C. Sun,

    1. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
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  • Y. L. Wu,

    1. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
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  • J. W. Gao,

    1. Institute for Adv. Mater.(IAM), South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
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  • G. A. Cheng,

    1. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
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  • G. Chen,

    1. Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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  • R. T. Zheng

    Corresponding author
    1. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China
    • Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, P. R. China.
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Abstract

A large contrast in the electrical and thermal conductivities via a first order phase transition in surface-functionalized carbon nanotube(CNT)/hexadecane composites is reported. Surface modification of the CNTs improves the electrical conductivity contrast and the stability of the composites. We demonstrate that, with these composites, the electrical conductivity changes above 105 times and the thermal conductivity varies up to 3 times at 18 °C.

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