期刊
APPLIED PHYSICS LETTERS
卷 104, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4869026
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资金
- Purdue Cooling Technologies Research Center (CTRC), a National Science Foundation (NSF) industry/university co-operative research center
- Defense Threat Reduction Agency (DTRA)
The author reports an experimental study of electrical and thermal transport in reduced graphene oxide (RGO)/polystyrene (PS) composites. The electrical conductivity (sigma) of RGO/PS composites with different RGO concentrations at room temperature shows a percolation behavior with the percolation threshold of similar to 0.25 vol. %. Their temperature-dependent electrical conductivity follows Efros-Shklovskii variable range hopping conduction in the temperature range of 30-300K. The thermal conductivity (kappa) of composites is enhanced by similar to 90% as the concentration is increased from 0 to 10 vol. %. The thermal conductivity of composites approximately linearly increases with increasing temperature from 150 to 300 K. Composites with a higher concentration show a stronger temperature dependence in the thermal conductivity. (C) 2014 AIP Publishing LLC.
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