Mitra, Sreemanta ; Mondal, Oindrila ; Saha, Dhriti Ranjan ; Datta, Anindya ; Banerjee, Sourish ; Chakravorty, Dipankar (2011) Magnetodielectric effect in graphene-PVA nanocomposites Journal of Physical Chemistry C, 115 (29). pp. 14285-14289. ISSN 1932-7455
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp203724f
Related URL: http://dx.doi.org/10.1021/jp203724f
Abstract
Graphene-polyvinyl alcohol (PVA) nanocomposite films with thickness of 120 μm were synthesized by solidification of PVA in a solution with dispersed graphene nanosheets. Electrical conductivity data were explained as arising due to hopping of carriers between localized states formed at the graphene-PVA interface. Dielectric permittivity data as a function of frequency indicated the occurrence of Debye-type relaxation mechanism. The nanocomposites showed a magnetodielectric effect with the dielectric constant changing by 1.8% as the magnetic field was increased to 1 T. The effect was explained as arising because of Maxwell-Wagner polarization as applied to an inhomogeneous 2D, two-component composite model. This type of nanocomposite may be suitable for applications involving nanogenerators.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 65700 |
| Deposited On: | 17 Oct 2011 10:40 |
| Last Modified: | 17 Oct 2011 10:40 |
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