Synthesis and characterization of Fe<inf>3</inf>O<inf>4</inf> nanoparticles coated with fucan polysaccharides

V. A.J. Silva, P. L. Andrade, M. P.C. Silva, A. D. Bustamante, Luis De Los Santos Valladares, J. Albino Aguiar

Research output: Contribution to journalArticle

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Abstract

In this work we report the preparation of fucan-coated magnetite (Fe 3O4) nanoparticles by the co-precipitation method. These nanoparticles were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectro-scopy, Mössbauer spectroscopy and magnetic measurements. The nanoparticles showed quasi-spherical morphology with mean sizes around 10 nm. XRD and FT-IR confirmed the functionalization of the Fe3O4 nanoparticles with the fucan polysaccharide. Room temperature magnetization measurements and Mössbauer spectroscopy showed that the nanoparticles exhibited superparamagnetic behavior at 300 K and the magnetic properties of the Fe3O4 are partly screened by the coating preventing aggregation. © 2013 Elsevier B.V. All rights reserved.
Original languageAmerican English
Pages (from-to)138-143
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
DOIs
StatePublished - 1 Jan 2013

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