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Low temperature charge transport and microwave absorption of carbon coated iron nanoparticles-polymer composite films

Prasad, V (2012) Low temperature charge transport and microwave absorption of carbon coated iron nanoparticles-polymer composite films. In: MATERIALS RESEARCH BULLETIN, 47 (6). pp. 1529-1532.

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Official URL: http://dx.doi.org/10.1016/j.materresbull.2012.02.0...

Abstract

In this paper, the low temperature electrical conductivity and microwave absorption properties of carbon coated iron nanoparticles-polyvinyl chloride composite films are investigated for different filler fractions. The filler particles are prepared by the pyrolysis of ferrocene at 980 degrees C and embedded in polyvinyl chloride matrix. The high resolution transmission electron micrographs of the filler material have shown a 5 nm thin layer graphitic carbon covering over iron particles. The room temperature electrical conductivity of the composite film changes by 10 orders of magnitude with the increase of filler concentration. A percolation threshold of 2.2 and an electromagnetic interference shielding efficiency (EMI SE) of similar to 18.6 dB in 26.5-40 GHz range are observed for 50 wt% loading. The charge transport follows three dimensional variable range hopping conduction. (C) 2012 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to Elsevier Ltd
Keywords: Composites;Vapor deposition;Electron microscopy;Electrical properties
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 14 Jul 2012 07:03
Last Modified: 14 Jul 2012 07:03
URI: http://eprints.iisc.ernet.in/id/eprint/44687

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