Journal of Siberian Federal University. Mathematics & Physics / Temperature Dependences of Conductivity and Magnetoconductivity of Multiwall Carbon Nanotubes Annealed at Different Temperatures

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Issue
Journal of Siberian Federal University. Mathematics & Physics. 2011 4 (2)
Authors
Borodanov, Sergey D.; Romanenko, Anatoly I.; Anikeeva, Olga B.; Kuznetsov, Vladimir L.; Elumeeva, Karina V.; Moseenkov, Sergey I.
Contact information
Borodanov, Sergey D. : Nikolaev Institute of Inorganic Chemistry, SB RAS Novosibirsk State University , Lavrentieva, 3, Novosibirsk, 630090 Russia Pirogova, 2, Novosibirsk, 630090 Russia , e-mail: ; Romanenko, Anatoly I. : Nikolaev Institute of Inorganic Chemistry, SB RAS Novosibirsk State University , Lavrentieva, 3, Novosibirsk, 630090 Russia Pirogova, 2, Novosibirsk, 630090 Russia; Anikeeva, Olga B. : Nikolaev Institute of Inorganic Chemistry, SB RAS Novosibirsk State University , Lavrentieva, 3, Novosibirsk, 630090 Russia Pirogova, 2, Novosibirsk, 630090 Russia; Kuznetsov, Vladimir L. : Novosibirsk State University Boreskov Institute of Catalysis, SB RAS , Pirogova, 2, Novosibirsk, 630090 Russia Lavrentieva, 5, Novosibirsk, 630090, Russia; Elumeeva, Karina V. : Novosibirsk State University Boreskov Institute of Catalysis, SB RAS , Pirogova, 2, Novosibirsk, 630090 Russia Lavrentieva, 5, Novosibirsk, 630090, Russia; Moseenkov, Sergey I. : Novosibirsk State University Boreskov Institute of Catalysis, SB RAS , Pirogova, 2, Novosibirsk, 630090 Russia Lavrentieva, 5, Novosibirsk, 630090, Russia
Keywords
conductivity; magnetoconductivity; annealed multiwall carbon nanotubes; one-dimensional variable range hopping; quantum corrections to conductivity
Abstract

Temperature (in range 4.2-300 K) and magnetic field (in fields up to 10 kG at 4.2 K) dependences of the conductivity of two sets of multiwall carbon nanotubes with different average diameters (8-10 nm and 20-22 nm) heated at various temperatures (1600, 2200, 2600, 2800◦C) were investigated. Temperature dependences for nanotubes with average diameter 20-22 nm is typical for quantum corrections to conduc- tivity of the systems with interaction electrons in two dimensional conductors with local disorder. For nanotubes with average diameter 8-10 nm temperature dependences corresponds to one-dimensional variable range hopping conductivity (VRHC). The variation of annealing temperature of MWNTs influence on the contribution of corrections to conductivity and parameters of VRHC. The magnetoconductivity of MWNTs also depends on the annealing temperature and is less than that of highly oriented pyrographite. Annealed MWNTs with average diameter 20-22 nm has a positive magnetoconductivity.

Pages
143-148
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/2288