Influence of the screening effect on the frequency dependence of the electrical conductivity of a composite material based on carbon nanotubes

Authors

  • Mikhail V. Shuba Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus
  • Dzmitry I. Yuko Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus
  • Darya N. Meisak Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus
  • Olga V. Sedelnikova Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia; Tomsk State University, 36 Lenin Street, Tomsk 634050, Russia
  • Mikhail A. Kanygin Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia
  • Aleksandr V. Okotrub Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia; Tomsk State University, 36 Lenin Street, Tomsk 634050, Russia

Keywords:

carbon nanotubes, composite materials, microwave and terahertz conductivity

Abstract

In the terahertz and microwave ranges, the frequency dependence of the electrical conductivity of a thin film and polymer composite materials comprising single-walled carbon nanotubes (CNT) is measured. It is shown that frequency dependence of the conductivity is weaker for the CNT film than for composite materials in the range 30.0 GHz – 1.5 THz. The conductivity of polymer composite material increases by two times as the weight fraction of CNTs increases by 10 times (from 0.1 to 1.0 %). We calculated the effective conductivity of the composite materials comprising CNTs non-interacting with each other. To describe the electromagnetic response of CNT agglomerates, we model them as spherical nanoparticles having the same permittivity as the CNT film. It is substantiated that the main effect determining the frequency dependence of real composites is a field screening in both individual nanotubes and their agglomerates. The aggregation effect diminishes strongly the conductivity of composite materials resulting in its slight variation at a manifold increase of the weight fraction of the inclusions.

Author Biographies

  • Mikhail V. Shuba, Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus

    PhD (physics and mathematics); researcher at the laboratory of nanoelectromagnetism

  • Dzmitry I. Yuko, Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus

    leading software engineer at the laboratory of nanoelectromagnetism

  • Darya N. Meisak, Research Institute for Nuclear Problems, Belarusian State University, 11 Babrujskaja Street, Minsk 220030, Belarus

    junior research assistant at the laboratory of nano electromagnetism

  • Olga V. Sedelnikova, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia; Tomsk State University, 36 Lenin Street, Tomsk 634050, Russia

    PhD (physics and mathematics); senior researcher at the laboratory of physicochemistry of nanomaterials, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences; senior researcher at the laboratory of terahertz research, Tomsk State University

  • Mikhail A. Kanygin, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia

    PhD (physics and mathematics); researcher at the laboratory of physicochemistry of nanomaterials

  • Aleksandr V. Okotrub, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3 Laŭrencʼjeva Avenue, Novosibirsk 630090, Russia; Tomsk State University, 36 Lenin Street, Tomsk 634050, Russia

    doctor of science (physics and mathematics); head of the laboratory of physicochemistry of nanomaterials, Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences; senior researcher at the laboratory of terahertz research, Tomsk State University

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Published

2018-04-30

Issue

No. 1 (2018): Journal of the Belarusian State University. Physics

Section

Condensed State Physics

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How to Cite

(1)
Shuba, M. V.; Yuko, D. I.; Meisak, D. N.; Sedelnikova, O. V.; Kanygin, M. A.; Okotrub, A. V. Influence of the Screening Effect on the Frequency Dependence of the Electrical Conductivity of a Composite Material Based on Carbon Nanotubes. Журнал Белорусского государственного университета. Физика 2018, No. 1, 80-87.