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Experimental characterization of dielectric properties of carbon nanotube networks

Published online by Cambridge University Press:  22 February 2011

Mahmoud A. EL Sabbagh
Mahmoud A. EL Sabbagh*
Affiliation:
Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, NY 13244, USA. Phone: +1 479-287-9074.
*
Corresponding author: M.A. EL Sabbagh Email: msabbagh@ieee.org
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Abstract

This paper explores the characterization of dielectric and conductive properties of carbon nanotube (CNT) networks. This is carried out by building planar transmission lines where conventional metallic traces are replaced by CNT networks. The proposed transmission lines with CNT networks are presented. Experimental realization and repeated two-port microwave measurements of proposed transmission lines enable the accurate extractions of their fundamental parameters showing percolation effects due to presence of CNT networks. The frequency-dependent phase velocity characteristics show a dramatic reduction compared to the speed of light in vacuum. The large magnitude of extracted complex permittivity for CNT networks also exhibits its percolation performance. The effects of CNTs' bulk density on measured and calculated parameters are explained. The results presented in this paper demonstrate the feasibility and the potential of building transmission lines and radio-frequency (RF) circuits elements using CNT networks.

Keywords

Carbon nanotubesnanotechnologypercolationpermittivityphase velocityplanar transmission lines
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 4 , August 2011 , pp. 465 - 475
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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