Synthesis and characterization of Fe3O4 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 journalArticlepeer-review

134 Scopus citations

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.

Original languageEnglish
Pages (from-to)138-143
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume343
DOIs
StatePublished - 2013
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Brazilian science agencies Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) , the Conselho Nacional de Desenvolvimento Científico e Tecnólogico (CNPq) and the Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco (FACEPE) ( APQ-0589-1.05/08 ).

Keywords

  • Fucan
  • Magnetic nanoparticle
  • Magnetite

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