1. Effect of nitrogen doping on the electromagnetic properties of carbon nanotube-based composites.
- Author
-
Kanygin, M. A., Sedelnikova, O. V., Asanov, I. P., Bulusheva, L. G., Okotrub, A. V., Kuzhir, P. P., Plyushch, A. O., Maksimenko, S. A., Lapko, K. N., Sokol, A. A., Ivashkevich, O. A., and Lambin, Ph.
- Subjects
- *
DOPING agents (Chemistry) , *CARBON nanotubes , *CARBON nanofibers , *NANOTUBES , *COMPOSITE materials research - 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 (Ka-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. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF