Preparation and Characterization of Algal Polysaccharides/Magnetite Microparticles Composite Films

Diaz-Bleis, D.; Freile‐Pelegrín, Yolanda; Vales-Pinzon, C.; Martínez-Torres, P.; Alvarado‐Gil, J. J.

doi:10.1007/s10765-012-1252-7

Cited by 5 publications

(1 citation statement)

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“…A well-characterized agar guarantees its reproducibility and the possibility of developing magnetic nanoparticles of different compositions. Recently, our group prepared carbonyl iron particles (CIP)-agar composites with an agar extracted from the species Gelidium robustum, the main commercial agar source in Mexico [11], which showed promising results for hyperthermia therapy [12,13]. This species grows along the Pacific coast of Baja California and can be found in commercial stands, where it is exploited and processed for agar production.…”

Section: Introductionmentioning

confidence: 99%

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

Diaz-Bleis¹,

Alvarado‐Gil

Martı́nez

et al. 2018

Bull Mater Sci

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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 < 8 nm) of Fe 3 O 4 agar coated at ≥ 3% agar showed high-saturation magnetization and high degree of biocompatibility and can be considered as promising candidates for biomedical applications.

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Section: Introductionmentioning

confidence: 99%