TY - JOUR
T1 - How effectively do carbon nanotube inclusions contribute to theelectromagnetic performance of a composite material? Estimation criteria from microwave and terahertz measurements
AU - Shuba, Mikhail
AU - Yuko, Dzmitry
AU - Kuzhir, Polina
AU - Maksimenko, Sergey
AU - Kanygin, Mikhail
AU - Okotrub, Alexander
AU - Tenne, Reshev
AU - Lambin, Philippe
N1 - Funding Information:
This research was partially supported by EU Projects GRAPHENE Core 1 - n.696656 , FP7-612285 project "CANTOR" PIRSES-GA - 2012-318617 ; H2020 MSCA-RISE-2014 project 644076 “CoExAN” and the MSCA-RISE-2016 project 734164 “Graphene-3D” . RT acknowledges the support of the H. Perlman foundation and the Irving and Azelle Waltcher Foundations in honour of Prof. M. Levy. PK and SM are thankful for support by Tomsk State University Competitiveness Improvement Program.
Funding Information:
This research was partially supported by EU Projects GRAPHENE Core 1 - n.696656, FP7-612285 project “CANTOR” PIRSES-GA-2012-318617; H2020 MSCA-RISE-2014 project 644076 “CoExAN” and the MSCA-RISE-2016 project 734164 “Graphene-3D”. RT acknowledges the support of the H. Perlman foundation and the Irving and Azelle Waltcher Foundations in honour of Prof. M. Levy. PK and SM are thankful for support by Tomsk State University Competitiveness Improvement Program.
Publisher Copyright:
© 2017 Elsevier Ltd
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - Screening effect in finite-length carbon nanotubes (CNT) and their agglomerates hinders significantly the electromagnetic interaction in composite materials. Screening effect is strong in the microwave range, and it decreases with increasing frequency resulting in a strong frequency dependence of the effective conductivity of the composite. Since screening effect is rather small in the terahertz range, the effective conductivity in this range is determined directly by the intrinsic conductivity of the inclusions. The ratio of the microwave to terahertz effective conductivities was proposed as a parameter to estimate how effectively carbon nanotube inclusions contribute to the electromagnetic performance of composite materials in the microwave range. CNT film was considered as a material where maximal possible interaction of the CNTs with EM field occurs. Single-walled CNT films and CNT-based composite materials, as well as hybrid film comprising mixtures of WS2 nanotubes and CNTs were fabricated and measured in the microwave and terahertz ranges. The electromagnetic field interaction with the inclusions has been estimated for all the samples fabricated.
AB - Screening effect in finite-length carbon nanotubes (CNT) and their agglomerates hinders significantly the electromagnetic interaction in composite materials. Screening effect is strong in the microwave range, and it decreases with increasing frequency resulting in a strong frequency dependence of the effective conductivity of the composite. Since screening effect is rather small in the terahertz range, the effective conductivity in this range is determined directly by the intrinsic conductivity of the inclusions. The ratio of the microwave to terahertz effective conductivities was proposed as a parameter to estimate how effectively carbon nanotube inclusions contribute to the electromagnetic performance of composite materials in the microwave range. CNT film was considered as a material where maximal possible interaction of the CNTs with EM field occurs. Single-walled CNT films and CNT-based composite materials, as well as hybrid film comprising mixtures of WS2 nanotubes and CNTs were fabricated and measured in the microwave and terahertz ranges. The electromagnetic field interaction with the inclusions has been estimated for all the samples fabricated.
UR - http://www.scopus.com/inward/record.url?scp=85039717438&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2017.12.067
DO - 10.1016/j.carbon.2017.12.067
M3 - Article
SN - 0008-6223
VL - 129
SP - 688
EP - 694
JO - Carbon
JF - Carbon
ER -