Effect of nitrogen doping on the electromagnetic properties of carbon nanotube-based composites

M. A. Kanygin, O. V. Sedelnikova, I. P. Asanov, L. G. Bulusheva, A. V. Okotrub, P. P. Kuzhir, A. O. Plyushch, S. A. Maksimenko, K. N. Lapko, A. A. Sokol, O. A. Ivashkevich, Philippe Lambin

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Nitrogen-doped and pure carbon nanotube (CNT) based composites were fabricated for investigating their dielectric properties in static regime as well as electromagnetic response properties in microwave frequency range (K a-band). Two classes of host matrix-polystyrene and phosphate unfired ceramics-have been used for composites fabrication. The study reveals miscellaneous effect of nitrogen doping on the dielectric permittivity, dc conductivity and electromagnetic interference shielding efficiency of CNT-based composites, produced with both polymer and ceramic matrices. The high-frequency polarizability, estimated for different-length CNTs, and static polarizability, calculated for nitrogen-containing CNT models using a quantum-chemical approach, show that this effect results from a decrease of the nanotube defect-free-length and deterioration of the polarizability with incorporation of nitrogen in pyridinic form.

    Original languageEnglish
    Article number144315
    Number of pages8
    JournalJournal of Applied Physics
    Volume113
    Issue number14
    DOIs
    Publication statusPublished - 14 Apr 2013

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