Effect of gases on the temperature dependence of the electric conductivity of CVD multiwalled carbon nanotubes

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776107070345· OSTI ID:21075789

Romanenko, A I; Anikeeva, O B ^[1]; Kuznetsov, V L; Usol'tseva, A N ^[2]; Tkachev, E N ^[3]

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1. Russian Academy of Sciences, Nikolaev Institute of Inorganic Chemistry, Siberian Division (Russian Federation)
2. Russian Academy of Sciences, Boreskov Institute of Catalysis, Siberian Division (Russian Federation)
3. 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, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 1 Vol. 105; ISSN JTPHES; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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