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Title: Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers

Abstract

Thermal transport in oxidized polyacetylene (PA) nanofibers with diameters in the range between 74 and 126 nm is measured with the use of a suspended micro heater device. With the error due to both radiation and contact thermal resistance corrected via a differential measurement procedure, the obtained thermal conductivity of oxidized PA nanofibers varies in the range between 0.84 and 1.24 W m{sup −1} K{sup −1} near room temperature, and decreases by 40%–70% after iodine doping. It is also found that the thermal conductivity of oxidized PA nanofibers increases with temperature between 100 and 350 K. Because of exposure to oxygen during sample preparation, the PA nanofibers are oxidized to be electrically insulating before and after iodine doping. The measurement results reveal that iodine doping can result in enhanced lattice disorder and reduced lattice thermal conductivity of PA nanofibers. If the oxidation issue can be addressed via further research to increase the electrical conductivity via doping, the observed suppressed lattice thermal conductivity in doped polymer nanofibers can be useful for the development of such conducting polymer nanostructures for thermoelectric energy conversion.

Authors:
 [1]; ; ;  [2]; ;  [3];  [3]
  1. Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189 (China)
  2. Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712 (United States)
  3. Department of Polymer Chemistry, Kyoto University, Kyoto 615-8510 (Japan)
Publication Date:
OSTI Identifier:
22258789
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 114; Journal Issue: 19; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; ENERGY CONVERSION; ERRORS; HEATERS; IODINE; NANOSTRUCTURES; OXIDATION; OXYGEN; POLYMERS; SAMPLE PREPARATION; THERMAL CONDUCTIVITY

Citation Formats

Bi, Kedong, Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, Weathers, Annie, Pettes, Michael T., Shi, Li, Matsushita, Satoshi, Akagi, Kazuo, Goh, Munju, and Institute of Advanced Composite Materials, Korea Institute of Science and Technology. Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers. United States: N. p., 2013. Web. doi:10.1063/1.4831945.
Bi, Kedong, Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, Weathers, Annie, Pettes, Michael T., Shi, Li, Matsushita, Satoshi, Akagi, Kazuo, Goh, Munju, & Institute of Advanced Composite Materials, Korea Institute of Science and Technology. Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers. United States. https://doi.org/10.1063/1.4831945
Bi, Kedong, Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, Weathers, Annie, Pettes, Michael T., Shi, Li, Matsushita, Satoshi, Akagi, Kazuo, Goh, Munju, and Institute of Advanced Composite Materials, Korea Institute of Science and Technology. 2013. "Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers". United States. https://doi.org/10.1063/1.4831945.
@article{osti_22258789,
title = {Iodine doping effects on the lattice thermal conductivity of oxidized polyacetylene nanofibers},
author = {Bi, Kedong and Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712 and Weathers, Annie and Pettes, Michael T. and Shi, Li and Matsushita, Satoshi and Akagi, Kazuo and Goh, Munju and Institute of Advanced Composite Materials, Korea Institute of Science and Technology},
abstractNote = {Thermal transport in oxidized polyacetylene (PA) nanofibers with diameters in the range between 74 and 126 nm is measured with the use of a suspended micro heater device. With the error due to both radiation and contact thermal resistance corrected via a differential measurement procedure, the obtained thermal conductivity of oxidized PA nanofibers varies in the range between 0.84 and 1.24 W m{sup −1} K{sup −1} near room temperature, and decreases by 40%–70% after iodine doping. It is also found that the thermal conductivity of oxidized PA nanofibers increases with temperature between 100 and 350 K. Because of exposure to oxygen during sample preparation, the PA nanofibers are oxidized to be electrically insulating before and after iodine doping. The measurement results reveal that iodine doping can result in enhanced lattice disorder and reduced lattice thermal conductivity of PA nanofibers. If the oxidation issue can be addressed via further research to increase the electrical conductivity via doping, the observed suppressed lattice thermal conductivity in doped polymer nanofibers can be useful for the development of such conducting polymer nanostructures for thermoelectric energy conversion.},
doi = {10.1063/1.4831945},
url = {https://www.osti.gov/biblio/22258789}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 19,
volume = 114,
place = {United States},
year = {2013},
month = {11}
}