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Carbon nanotube composites with high dielectric constant at low percolation threshold
Abstract
In this letter, the dielectric properties of the untreated multiwall carbon-nanotubes∕poly(vinylidene fluoride) (MWNT∕PVDF) composites are studied. Towards low frequencies, the dielectric constant of a composite with about 2.0vol% of MWNT increases rapidly and the value of the dielectric constant is as high as 300. However, by a calculation, the percolation threshold of the MWNT∕PVDF composites is only 1.61vol% (0.0161 volume fraction) of MWNT. Both the large aspect ratio and the high conductivity of the MWNT may lead to the low percolation threshold of the MWNT∕PVDF composites. For the percolation composite, the dielectric loss value is always less than 0.4, irrespective of the frequency. Therefore, the experimental results suggest that the dielectric properties of MWNT∕PVDF composites may be improved significantly without the chemical functionalization to carbon nanotubes.
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Kirkpatrick, S. (1973) · Reviews of Modern Physics · doi:10.1103/revmodphys.45.574 · Cited by 5,260
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Self-citationSensors and actuators based on carbon nanotubes and their composites: A review
Li, C., Thostenson, E. T., & Chou, T.-W. (2008) · Composites Science and Technology · doi:10.1016/j.compscitech.2008.01.006 · Cited by 934
Dang, Z., Zheng, M., & Zha, J. (2016) · Small · doi:10.1002/smll.201503193 · Cited by 485
Self-citationPolymer nanocomposite dielectrics for capacitive energy storage
Yang, M., Guo, M., Xu, E., Ren, W., Wang, D., Li, S., Zhang, S., Nan, C.-W., & Shen, Y. (2024) · Nature Nanotechnology · doi:10.1038/s41565-023-01541-w · Cited by 423
Li, Y., Huang, X., Hu, Z., Jiang, P., Li, S., & Tanaka, T. (2011) · ACS Applied Materials & Interfaces · doi:10.1021/am2010459 · Cited by 386
Metadata
- Authors
- Wang, L., & Dang, Z.-M.
- Venue
- Applied Physics Letters
- Publisher
- AIP Publishing
- Published
- 2005-07-21
- Volume
- 87
- Issue
- 4
- ISSN
- 0003-6951 (ISSN-L)
- 1077-3118
- OpenAlex
- W2085122470
- Cited by
- 535
- References
- 1
- FWCI
- 11.32
- Type
- journal article
- Language
- en
- Open access
- closed
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