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Synthesis, conductivity and dielectric characterization of salicylic acid-Fe3O4 nanocomposite
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2010 (English)In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 123, no 1, 184-190 p.Article in journal (Refereed) Published
Abstract [en]

We report on the synthesis of water dispersible salicylic acid -Fe3O4 nanocomposites via a co-precipitation route by using Fe(III) and Fe(II) chloride salts, and salicylic acid. Crystalline phase was identified as Fe3O4 and the crystallite size was obtained as 13 +/- 6 nm from X-ray line profile fitting. As compared to the particle size of 20 nm obtained from TEM analysis these particles show polycrystalline nature. The capping of salicylic acid around Fe3O4 nanoparticles was confirmed by FTIR spectroscopy, the interaction being via bridging oxygens of the carboxylate and the nanoparticle surface. ac and dc conductivity measurements performed on the nanocomposite revealed semiconductor characteristics and varying trends with temperature due to reorganization of the nanocomposite. Permittivity measurements showed increasing dielectric constant with increasing temperature as expected from semiconductors. Analysis of electrical modulus and dielectric permittivity functions suggest that ionic and polymer segmental motions are strongly coupled in the nanocomposite. (C) 2010 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 123, no 1, 184-190 p.
Keyword [en]
Nanostructures, Precipitation, Powder diffraction, Dielectric properties
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-27236DOI: 10.1016/j.matchemphys.2010.03.080ISI: 000279305800031Scopus ID: 2-s2.0-77953154699OAI: oai:DiVA.org:kth-27236DiVA: diva2:379432
Note
QC 20101217Available from: 2010-12-17 Created: 2010-12-09 Last updated: 2017-12-11Bibliographically approved

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Toprak, Muhammet

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