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Synthesis, structural and conductivity characterization of alginic acid-Fe3O4 nanocomposite
KTH, School of Information and Communication Technology (ICT), Material Physics, Functional Materials, FNM.ORCID iD: 0000-0001-5678-5298
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2010 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 12, no 8, 3039-3048 p.Article in journal (Refereed) Published
Abstract [en]

Alginic acid-Fe3O4 nanocomposite is synthesized by the precipitation of Fe3O4 in the presence of alginic acid (AA). Structural, surface, morphological, thermal and electrical transport properties of the nanocomposite were performed by XRD, FT-IR, TEM-SEM, TGA and conductivity measurements respectively. FT-IR analysis revealed that Fe3O4 NPs are strongly capped with AA and TGA analysis showed that nanocomposite have 80% of Fe3O4 content. TEM analysis of Fe3O4 NPs show an average particle size of 9.5 nm, and upon nanocomposite formation with AA these particles are observed to form aggregates of similar to 150 nm. The frequency-dependency of the AC conductivity show electrode polarization effect. Analysis of electrical modulus and dielectric permittivity functions suggest that ionic and polymer segmental motions are strongly coupled. DC electrical conductivity is strongly temperature dependent, and is classified into three regions over a limited temperature range of up to 100 A degrees C.

Place, publisher, year, edition, pages
2010. Vol. 12, no 8, 3039-3048 p.
Keyword [en]
Nanocomposite, Magnetite, Conductivity, TEM, Magnetic nanoparticles
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-27365DOI: 10.1007/s11051-010-9898-1ISI: 000284275600034ScopusID: 2-s2.0-77955568733OAI: diva2:377395
Knut and Alice Wallenberg Foundation, UAW2004.0224
QC 20101214Available from: 2010-12-14 Created: 2010-12-13 Last updated: 2010-12-14Bibliographically approved

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Toprak, Muhammet
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