On the preparation and characterization of superparamagnetic nanoparticles with Gelidium robustum agar coating for biomedical applications

Superparamagnetic nanoparticles coated with natural polysaccharides are of great interest for biomedical applications due to their fast response to an external and high-frequency electromagnetic field and their biocompatibility. One of the greatest challenges in the development of these nanoparticle...

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Bibliographic Details
Published in:Bulletin of materials science 2018-04, Vol.41 (2), p.39, Article 39
Main Authors: Díaz-Bleis, Dianela, Alvarado-Gil, Juan José, Martínez, Arturo I, Gómez-y-Gómez, Yolanda, Freile-Pelegrín, Yolanda
Format: Article
Language:English
Subjects:
Agar
Algae
Aqueous solutions
Biocompatibility
Biomedical materials
Chemistry and Materials Science
Chloride
Cobalt
Cobalt ferrites
Crystallinity
Cytotoxicity
Electromagnetic fields
Engineering
Fourier transforms
Grain size
Hyperthermia
Iron oxides
Magnetic saturation
Magnetite
Materials Science
Morphology
Nanoparticles
Polymers
Polysaccharides
Protective coatings
Reproducibility
Scanning electron microscopy
Spectrum analysis
Toxicity
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Summary:Superparamagnetic nanoparticles coated with natural polysaccharides are of great interest for biomedical applications due to their fast response to an external and high-frequency electromagnetic field and their biocompatibility. One of the greatest challenges in the development of these nanoparticles is related to the specific characteristics and properties of the polysaccharide used, which could guarantee the development of specific sizes, crystalline structure, magnetic response and its reproducibility. In this study, we present the preparation of magnetite ( Fe 3 O 4 ) and cobalt ferrite ( CoFe 2 O 4 ) nanoparticles by the co-precipitation method in aqueous solutions at different concentrations (1, 2, 3, 4 and 5%) of a very well-characterized agar obtained from the red marine algae Gelidium robustum. It is shown that under the same experimental conditions and using the adequate precursors, coated high-crystallinity magnetite nanoparticles are obtained. In contrast, for cobalt ferrite, our results indicated the formation of coated low-crystallinity CoFe 2 O 4 particles. Superparamagnetic nanoparticles (with crystal grain size
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-018-1546-x