Joy, L.K. and Sooraj, V. and Sajeev, U.S. and Swapna, S.Nair and Narayanan, T.N. and Sethulakshmi, N. and Ajayan, P.M. and Anantharaman, M.R. (2014) Large enhanced dielectric permittivity in polyaniline passivated core-shell nano magnetic iron oxide by plasma polymerization. Applied Physics Letters, 104. pp. 121603-121611. ISSN 0003-6951

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Commercial samples of Magnetite with size ranging from 25–30nm were coated with polyaniline by using radio frequency plasma polymerization to achieve a core shell structure of magnetic nanoparticle (core)–Polyaniline (shell). High resolution transmission electron microscopy images confirm the core shell architecture of polyaniline coated iron oxide. The dielectric properties of the material were studied before and after plasma treatment. The polymer coated magnetite particles exhibited a large dielectric permittivity with respect to uncoated samples. The dielectric behavior was modeled using a Maxwell–Wagner capacitor model. A plausible mechanism for the enhancement of dielectric permittivity is proposed

Item Type: Article
Uncontrolled Keywords: nanoparticles; polyaniline; plasma polymerization
Subjects: Functional Materials
Depositing User: Dr. N Meyyappan
Date Deposited: 14 May 2015 09:35
Last Modified: 14 May 2015 09:35

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