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Microwave shielding of transparent and conducting single-walled carbon nanotube films

Summary: Microwave shielding of transparent and conducting single-walled carbon
nanotube films
Hua Xu and Steven M. Anlage
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park,
Maryland 20742-4111
Liangbing Hu and George Grunera
Department of Physics, University of California, Los Angeles, California 90095
Received 27 November 2007; accepted 5 April 2007; published online 4 May 2007
The authors measured the transport properties of single-walled carbon nanotube SWCNT films in
the microwave frequency range from 10 MHz to 30 GHz by using the Corbino reflection technique
from temperatures of 20400 K. Based on the real and imaginary parts of the microwave
conductivity, they calculated the shielding effectiveness for various film thicknesses. Shielding
effectiveness of 43 dB at 10 MHz and 28 dB at 10 GHz are found for films with 90% optical
transmittance, which suggests that SWCNT films are promising as a type of transparent microwave
shielding material. By combining their data with those from the literature, the conductivity of
SWCNT films was established in a broad frequency range from dc to visible. 2007 American
Institute of Physics. DOI: 10.1063/1.2734897
Single-walled carbon nanotubes SWCNTs are emerg-
ing as building blocks of electronics for a variety of applica-
tions. In particular, films of nanotubes have found potential


Source: Anlage, Steven - Center for Superconductivity Research & Department of Physics, University of Maryland at College Park


Collections: Materials Science