Temperature Dependences of Conductivity and Magnetoconductivity of Multiwall Carbon Nanotubes
Annealed at Different Temperatures
Full article
Journal |
Журнал Сибирского федерального университета. Серия: Химия (Journal of Siberian Federal University. Chemistry)
ISSN: 1998-2836
, E-ISSN: 2313-6049
|
Output data |
Year: 2011,
Volume: 4,
Number: 2,
Pages: 143-148
Pages count
: 6
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Tags |
проводимость, магнетопроводимость, отожженные многослойные углеродные нанотрубки, одномерная прыжковая проводимость с переменной длиной прыжка, квантовые поправки к проводимости |
Authors |
Borodanov Sergey D.
1,2
,
Romanenko Anatoly I.
1,2
,
Anikeeva Olga B.
1,2
,
Kuznetsov Vladimir L.
2,3
,
Elumeeva Karina V.
2,3
,
Moseenkov Sergey I.
2,3
|
Affiliations |
1 |
Nikolaev Institute of Inorganic Chemistry, SB RAS, Lavrentieva, 3, Novosibirsk, 630090 Russia
|
2 |
Novosibirsk State University, Pirogova, 2, Novosibirsk, 630090 Russia
|
3 |
Boreskov Institute of Catalysis, SB RAS, Lavrentieva, 5, Novosibirsk, 630090, Russia
|
|
Funding (9)
1
|
International Science and Technology Center
|
B-1708
|
2
|
The Ministry of Education and Science of the Russian Federation
|
П339
|
3
|
The Ministry of Education and Science of the Russian Federation
|
P898
|
4
|
Russian Foundation for Basic Research
|
09-02-00331
|
5
|
The Ministry of Education and Science of the Russian Federation
|
16.740.11.0016
|
6
|
The Ministry of Education and Science of the Russian Federation
|
16.740.11.0146
|
7
|
Siberian Branch of the Russian Academy of Sciences
|
52
|
8
|
The Ministry of Education and Science of the Russian Federation
|
2.1.1/410
|
9
|
The Ministry of Education and Science of the Russian Federation
|
02.523.12.3020
|
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 conductivity 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.