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Journal Articles IEEE Transactions on Electromagnetic Compatibility Year : 2012

Rigorous characterization of carbon nanotube complex permittivity over a broadband of RF frequencies

Abstract

This study presents a comprehensive characterization of the frequency dependence of the effective complex permittivity of bundled carbon nanotubes (CNTs) considering different densities over a broadband of frequencies from 10 MHz to 50 GHz using only one measurement setup. The extraction technique is based on rigorous modeling of coaxial and circular discontinuities using a mode matching technique in conjunction with an inverse optimization method to map the simulated scattering parameters to those measured by a vector network analyzer. The dramatic values of complex permittivity obtained at low frequencies are physically explained by the percolation theory. The effective permittivity of a mixture of nanoparticles of alumina and CNTs versus frequency and packing density is studied to verify the previously obtained phenomenon.

Dates and versions

hal-00686698 , version 1 (11-04-2012)

Identifiers

Cite

Emmanuel Decrossas, Mahmoud A. El Sabbagh, Victor Fouad Hanna, Samir M. El-Ghazaly. Rigorous characterization of carbon nanotube complex permittivity over a broadband of RF frequencies. IEEE Transactions on Electromagnetic Compatibility, 2012, 54 (1), pp.81 - 87. ⟨10.1109/TEMC.2011.2174788⟩. ⟨hal-00686698⟩
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