Influence of gases on conductivity of onion-like carbon and multiwalled carbon nanotubes

Temperature dependences of the conductivity of onion-like carbon (OLC) and catalytic multiwalled carbon nanotubes (MWNTs) were measured in various gas environments: helium, hydrogen, oxygen, air, methane. We have found that in the vicinity of the melting and vaporization temperatures of oxygen and m...

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Bibliographic Details
Published in:Journal of Optoelectronics and Advanced Materials 2008-07, Vol.10 (7), p.1749-1753
Main Authors: Romanenko, A I, Anikeeva, O B, Kuznetsov, V L, Buryakov, T I, Tkachiev, E N, Moseenkov, S I, Usoltseva, A N
Format: Article
Language:English
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Summary:Temperature dependences of the conductivity of onion-like carbon (OLC) and catalytic multiwalled carbon nanotubes (MWNTs) were measured in various gas environments: helium, hydrogen, oxygen, air, methane. We have found that in the vicinity of the melting and vaporization temperatures of oxygen and methane the conductivity sharply decreases for MWNTs (by 2-12%) and for OLC (by 4-12%). The observed reversible changes of the conductivity of investigated samples are discussed in the terms of processes of gases adsorption-desorption on the surface of nanotubes and OLC and breakup-recovery of contacts between nanotubes and particles of OLC as a result of melting and vaporization of environment gases.
ISSN:1454-4164