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Title: Learning form Nature to improve the heat generation of iron-oxide nanoparticles for magnetic hyperthermia applications.
Author: Martínez Boubeta, José Carlos
Simeonidis, Konstantinos
Makridis, Antonios
Angelakeris, Makis
Iglesias, Òscar
Guardia, Pablo
Cabot i Codina, Andreu
Yedra Cardona, Lluís
Estradé Albiol, Sònia
Peiró Martínez, Francisca
Saghi, Zineb
Midgley, Paul A.
Conde-Leborán, Iván
Serantes, David
Baldomir, Daniel
Keywords: Càncer
Propietats magnètiques
Materials magnètics
Magnetic properties
Magnetic materials
Issue Date: 11-Apr-2013
Publisher: Nature Publishing Group
Abstract: The performance of magnetic nanoparticles is intimately entwined with their structure, mean size and magnetic anisotropy. Besides, ensembles offer a unique way of engineering the magnetic response by modifying the strength of the dipolar interactions between particles. Here we report on an experimental and theoretical analysis of magnetic hyperthermia, a rapidly developing technique in medical research and oncology. Experimentally, we demonstrate that single-domain cubic iron oxide particles resembling bacterial magnetosomes have superior magnetic heating efficiency compared to spherical particles of similar sizes. Monte Carlo simulations at the atomic level corroborate the larger anisotropy of the cubic particles in comparison with the spherical ones, thus evidencing the beneficial role of surface anisotropy in the improved heating power. Moreover we establish a quantitative link between the particle assembling, the interactions and the heating properties. This knowledge opens new perspectives for improved hyperthermia, an alternative to conventional cancer therapies.
Note: Reproducció del document publicat a:
It is part of: Scientific Reports, 2013, vol. 3, num. 1652, p. 1652-1-1652-8
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ISSN: 2045-2322
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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