This article is cited in 1 paper

Influence of the dielectric matrix on the electrical nanocomposites based on oxidized multi-walled carbon nanotubes

Ilya V. Totosov^ab, Anatoly I. Romanenko^ab, Olga B. Anikeeva^ab, Vladimir L. Kuznetsov^ac, Ilya N. Mazov^ac, Sergey I. Popkov^d, Kirill A. Shaichutdinov<sup>d

a</sup> Novosibirsk State University, Novosibirsk, Russia
^b Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
^c Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
^d L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia

Abstract: In this paper we consider the effect of oxidative treatments on the properties of multiwalled carbon nanotubes (MWNT). The experimental temperature dependence of electrical conductivity (in the temperature range 4,2–293 K) and field dependence of magnetoresistance (in fields up to 9 Tl at 10 K) of the samples with MWCNT modified by oxidation of the surface layers, as well as the composites based on them. It was established that the oxidation of the surface layers of MWCNTs in acid solutions leads to a change in the temperature dependence of electrical conductivity. Introduction of MWCNTs in a dielectric matrix of polymethylmethacrylate (PMMA) leads to the dependence of the conductivity close to that typical for hopping conductivity with variable hopping length, three-dimensional case.

Keywords: conductivity, magnetoconductivity, multi-walled carbon nanotubes.

UDC: 512.54

Received: 18.09.2010
Received in revised form: 25.11.2010
Accepted: 10.12.2010