Experimental determination of microwave attenuation and electrical permittivity of double-walled carbon nanotubes

Mircea Dragoman , Katia Grenier (1) , David Dubuc (1) , Laurent Bary (1) , Erwan Fourn (1) , Robert Plana (1) , Emmanuel Flahaut (2)

1 LAAS - Laboratoire d'analyse et d'architecture des systèmes
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The attenuation and the electrical permittivity of the double-walled carbon nanotubes (DWCNTs) were determined in the frequency range of 1–65 GHz. A micromachined coplanar waveguide transmission line supported on a Si membrane with a thickness of 1.4 µm was filled with a mixture of DWCNTs. The propagation constants were then determined from the S parameter measurements. The DWCNTs mixture behaves like a dielectric in the range of 1–65 GHz with moderate losses and an abrupt change of the effective permittivity that is very useful for gas sensor detection. ©2006 American Institute of Physics

Mots clés: Carbon nanotubes; Permittivity; S-parameters; Microwave materials

Domaines: Matériaux

Mircea Dragoman, Katia Grenier, David Dubuc, Laurent Bary, Erwan Fourn, et al.. Experimental determination of microwave attenuation and electrical permittivity of double-walled carbon nanotubes. Applied Physics Letters, 2006, 88 (15,), pp.1-3. ⟨10.1063/1.2193464⟩. ⟨hal-03598205⟩