"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

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

A. I. ROMANENKO1,2,* , O. B. ANIKEEVA1,2, V. L. KUZNETSOV2,3, T. I. BURYAKOV1,2, E. N. TKACHEV1,2, S. I. MOSEENKOV2,3, A. N. USOLTSEVA2,3

Affiliation

  1. Nikolaev Institute of Inorganic Chemistry Siberian Branch of Russian Academy of Science, Novosibirsk, Russia
  2. Novosibirsk State University, Novosibirsk, Russia
  3. Boreskov Institute of Catalysis Siberian Branch of Russian Academy of Science, Novosibirsk, Russia

Abstract

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 breakuprecovery of contacts between nanotubes and particles of OLC as a result of melting and vaporization of environment gases..

Keywords

Onion-like carbon, Multiwalled carbon nanotube, Conductivity, Gas sensor.

Submitted at: April 1, 2008
Accepted at: July 1, 2008

Citation

A. I. ROMANENKO, O. B. ANIKEEVA, V. L. KUZNETSOV, T. I. BURYAKOV, E. N. TKACHEV, S. I. MOSEENKOV, A. N. USOLTSEVA, Influence of gases on conductivity of onion-like carbon and multiwalled carbon nanotubes, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 7, pp. 1749-1753 (2008)