期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 343, 期 -, 页码 138-143出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2013.04.062
关键词
Magnetic nanoparticle; Magnetite; Fucan
资金
- Brazilian science agencies Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao de Amparo a Ciencia e Tecnologia do Estado de Pernambuco (FACEPE) [APQ-0589-1.05/08]
In this work we report the preparation of fucan-coated magnetite (Fe3O4) nanoparticles by the coprecipitation method. These nanoparticles were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, Mossbauer 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 Mossbauer 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. (C) 2013 Elsevier B.V. All rights reserved.
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