Special Section on Fundamental and Applied Nanoelectromagnetics

Electromagnetic shielding efficiency in Ka-band: carbon foam versus epoxy/carbon nanotube composites

[+] Author Affiliations
Polina P. Kuzhir

Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya Street, 11 Minsk 220030, Belarus

Alesia G. Paddubskaya

Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya Street, 11 Minsk 220030, Belarus

Mikhail V. Shuba

Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya Street, 11 Minsk 220030, Belarus

Sergey A. Maksimenko

Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya Street, 11 Minsk 220030, Belarus

Alain Celzard

Institut Jean Lamour—UMR CNRS 7198 and Laboratoire d'Etudes et de Recherches sur le Matériau Bois—Ecole Nationale Supérieure des Sciences et Technologies du Bois, 27, rue Philippe Séguin, BP 1041, 88051 Épinal Cedex 9, France

Vanessa Fierro

Institut Jean Lamour—UMR CNRS 7198 and Laboratoire d'Etudes et de Recherches sur le Matériau Bois—Ecole Nationale Supérieure des Sciences et Technologies du Bois, 27, rue Philippe Séguin, BP 1041, 88051 Épinal Cedex 9, France

Gisele Amaral-Labat

Institut Jean Lamour—UMR CNRS 7198 and Laboratoire d'Etudes et de Recherches sur le Matériau Bois—Ecole Nationale Supérieure des Sciences et Technologies du Bois, 27, rue Philippe Séguin, BP 1041, 88051 Épinal Cedex 9, France

Antonio Pizzi

Institut Jean Lamour—UMR CNRS 7198 and Laboratoire d'Etudes et de Recherches sur le Matériau Bois—Ecole Nationale Supérieure des Sciences et Technologies du Bois, 27, rue Philippe Séguin, BP 1041, 88051 Épinal Cedex 9, France

Gintaras Valušis

Center for Physical Sciences and Technology, Gostauto g. 11, LT-01108 Vilnius, Lithuania

Jan Macutkevic

Vilnius University (VU)3 Universiteto St, LT-01513 Vilnius, Lithuania

Maksim Ivanov

Vilnius University (VU)3 Universiteto St, LT-01513 Vilnius, Lithuania

Juras Banys

Vilnius University (VU)3 Universiteto St, LT-01513 Vilnius, Lithuania

Silvia Bistarelli

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Antonino Cataldo

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Matteo Mastrucci

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Federico Micciulla

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Immacolata Sacco

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Eleonora Stefanutti

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

Stefano Bellucci

National Institute of Nuclear Physics, Frascati National Laboratory, Via E. Fermi 40, I-00044 Frascati (Roma), Italy

J. Nanophoton. 6(1), 061715 (Dec 10, 2012). doi:10.1117/1.JNP.6.061715
History: Received August 17, 2012; Revised November 14, 2012; Accepted November 15, 2012
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Abstract.  The wide application of microwaves stimulates searching for new materials with high electrical conductivity and electromagnetic (EM) interference shielding effectiveness (SE). We conducted a comparative study of EM SE in Ka-band demonstrated by ultra-light micro-structural porous carbon solids (carbon foams) of different bulk densities, 0.042 to 0.150g/cm3, and conventional flexible epoxy resin filled with carbon nanotubes (CNTs) in small concentrations, 1.5 wt.%. Microwave probing of carbon foams showed that the transmission through a 2 mm-thick layer strongly decreases with decreasing the pore size up to the level of 0.6%, due to a rise of reflectance ability. At the same time, 1 mm thick epoxy/CNT composites showed EM attenuation on the level of only 66% to 37%. Calculating the high-frequency axial CNTs’ polarizability on the basis of the idea of using CNT as transmission lines, we devised a strategy to improve the EM SE of CNT-based composites: because of the high EM screening of inner shells of multi-walled CNTs in the GHz range, it is effective to use either single-walled CNT or multi-walled CNTs with a relatively small number of walls (up to 15, i.e., those taking part in the EM interaction, if the CNT length is 20 μm).

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Polina P. Kuzhir ; Alesia G. Paddubskaya ; Mikhail V. Shuba ; Sergey A. Maksimenko ; Alain Celzard, et al.
"Electromagnetic shielding efficiency in Ka-band: carbon foam versus epoxy/carbon nanotube composites", J. Nanophoton. 6(1), 061715 (Dec 10, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.061715


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