Dielectric relaxation and charge transfer mechanism in the composite material of nanoparticles BaTi[O.sub.3] with a modified surface in polystyrene

We present the results of investigations related to the dielectric relaxation process in the composite material of BaTi[O.sub.3] nanoparticles with the surface modified by hydroxyl groups and sodium oleate in polystyrene for the frequency range 1-140 kHz. The dispersion of the dielectric permittivit...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2015-11
Main Authors: Emelianov, Nikita A, Postnikov, Eugene B, Yacovlev, Oleg V, Chaplygin, Alexey A, Chekadanov, Alexander S, Mandalavi, Wisam M. Al
Format: Article
Language:English
Subjects:
Electric properties
Nanoparticles
Polystyrene
Online Access:Get full text
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Summary:We present the results of investigations related to the dielectric relaxation process in the composite material of BaTi[O.sub.3] nanoparticles with the surface modified by hydroxyl groups and sodium oleate in polystyrene for the frequency range 1-140 kHz. The dispersion of the dielectric permittivity in the composite material with the volume fraction 5-35% is detected due to the presence of the relaxation process resulted in a blurred spectrum of relaxation times. It is found that the presence of surface's modification leads to two effects related to the ac conductivity: a saturation of the frequency dependence and the further drastic growth, which may correspond to the specific hopping mechanism.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2015-60510-x