Publication: Propiedades magnéticas de materiales de baja dimensionalidad sometidos a campos de radiofrecuencia
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2022-03-18
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Universidad Complutense de Madrid
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Abstract
Las nanopartículas magneticas llevan decadas atrayendo la atencion de la comunidad científica debido a las propiedades que exhiben en la nanoescala y que difieren de las del material masivo. Ademas, pueden ser manipuladas mediante campos externos, presentan un tamaño reducido que es comparable con el de entidades biologicas y pueden presentar super paramagnetismo. El desarrollo de metodos de síntesis mejorados y la posibilidad de modificar la superficie del material han dado lugar en las ultimas decadas a su utilizacion en multitud de aplicaciones, tanto industriales como biomedicas. En particular, los oxidos de hierro como la magnetita Fe3O4 o la maghemita Fe2O3 son los sistemas de nanopartículas magneticas mas utilizadas en aplicaciones biomedicas.Por otro lado, los microhilos magneticos amorfos recubiertos de vidrio son materiales extraordinariamente blandos, cuyas propiedades y estructura magnetica se pueden modificar de forma sencilla, lo que los convierte en materiales muy atractivos con multitud de aplicaciones, como por ejemplo, en sensores de temperatura o de presion...
Magnetic nanoparticles have attracted great interest over the last decades due to their novel magnetic properties, such as superparamagnetism, that arises when the size of the material is reduced to the nanoscale. Furthermore, they can be manipulated by external elds and their size is comparable to biological entities, which makes them very interesting for biomedical applications. The development of synthesis methods and surface chemistry have made possible their application in several dierent fields, both technological and biomedical. In particular, iron oxide nanoparticles, such as magnetite Fe3O4 or maghemite Fe2O3, are one of the most used magnetic nanoparticles in biomedical application. On the other hand, glass-coated magnetic amorphous microwires exhibit excellent soft magnetic properties. Their properties and magnetic structure can be easily manipulated, which makes these materials very attractive for several application, such as their use in temperature or pressure sensors..
Magnetic nanoparticles have attracted great interest over the last decades due to their novel magnetic properties, such as superparamagnetism, that arises when the size of the material is reduced to the nanoscale. Furthermore, they can be manipulated by external elds and their size is comparable to biological entities, which makes them very interesting for biomedical applications. The development of synthesis methods and surface chemistry have made possible their application in several dierent fields, both technological and biomedical. In particular, iron oxide nanoparticles, such as magnetite Fe3O4 or maghemite Fe2O3, are one of the most used magnetic nanoparticles in biomedical application. On the other hand, glass-coated magnetic amorphous microwires exhibit excellent soft magnetic properties. Their properties and magnetic structure can be easily manipulated, which makes these materials very attractive for several application, such as their use in temperature or pressure sensors..
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 15-10-2021