Effect of gases on the temperature dependence of the electric conductivity of CVD multiwalled carbon nanotubes
- Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Siberian Division (Russian Federation)
- Russian Academy of Sciences, Boreskov Institute of Catalysis, Siberian Division (Russian Federation)
- Novosibirsk State University (Russian Federation)
The influence of various gaseous media on the temperature dependence of the electric conductivity {sigma} of multiwalled carbon nanotubes (MWNTs) synthesized using the method of catalytical chemical vapor deposition (CVD) has been studied. The {sigma}(T) curves were measured in a temperature range from 4.2 to 300 K in helium and its mixtures with air, methane, oxygen, and hydrogen. The introduction of various gaseous components into a helium atmosphere leads to a significant decrease in the conductivity of MWNTs in the interval between the temperatures of condensation and melting of the corresponding gas. Upon a heating-cooling cycle, the conductivity restores on the initial level. It is concluded that a decrease in {sigma} is caused by the adsorption of gases on the surface of nanotubes.
- OSTI ID:
- 21075789
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 105, Issue 1; Other Information: DOI: 10.1134/S1063776107070345; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
AIR
ATMOSPHERES
CARBON
CHEMICAL VAPOR DEPOSITION
COOLING
ELECTRIC CONDUCTIVITY
HEATING
HELIUM
HYDROGEN
MELTING
METHANE
MIXTURES
NANOTUBES
OXYGEN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K