Magnetodielectric effect of Graphene-PVA Nanocomposites

Autor:	Mitra, Sreemanta, Mondal, Oindrila, Saha, Dhriti ranjan, Datta, Anindya, Banerjee, Sourish, Chakravorty, Dipankar
Rok vydání:	2012
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	J.Phys. Chem. C, vol. 115 (29), 14285-14289, (2011)
Druh dokumentu:	Working Paper
DOI:	10.1021/jp203724f
Popis:	Graphene-Polyvinyl alcohol (PVA) nanocomposite films with thickness $120 \mu m$ 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 Tesla. The effect was explained as arising due to Maxwell-Wagner polarization as applied to an inhomogeneous two-dimensional,two-component composite model. This type of nanocomposite may be suitable for applications involving nanogenerators. Comment: 13 pages, 11 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1205.0384 Zobrazit plný text záznamu View this record from Arxiv