Title :
HF/Microwave Impedance of Carbon Nanotube Films
Author :
Liu, X. ; Ellis, A.V. ; Arnold, W.M.
Author_Institution :
Ind. Res. Ltd., Lower Hutt
Abstract :
The strength and conductivity of carbon nanotubes make them attractive materials for incorporation into composite materials for use in electrically lossy structures. Applications could include light-weight structures that are absorptive of radio and microwave signals. We have derivatised multi-walled nanotubes by acid treatment, formed them into layers on resistor-like chips, and then subjected these to dielectric characterization between 200 Hz and 1.8 GHz. Especially in the case of thicker layers, a highly-frequency-dependent behavior was observed. This was reduced when the electrode contacts were improved.
Keywords :
absorbing media; carbon nanotubes; electrical conductivity; electrodes; electromagnetic wave absorption; lightweight structures; mechanical strength; 2E2 to 1.8E9 Hz; HF impedance; acid treatment; carbon nanotube film; composite materials; dielectric characterization; electrical conductivity; electrically lossy structure; electrode contacts; light-weight structure; mechanical strength; microwave impedance; multiwalled nanotubes; resistor-like chips; Carbon nanotubes; Composite materials; Conducting materials; Conductivity; Dielectric materials; Hafnium; Impedance; Lightweight structures; Nanocomposites; Organic materials;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2006 IEEE Conference on
Conference_Location :
Kansas City, MO
Print_ISBN :
1-4244-0547-5
Electronic_ISBN :
1-4244-0547-5
DOI :
10.1109/CEIDP.2006.312068
