Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/129629
Title: | Magnetic nanoparticles with bulk-like properties |
Author: | Batlle Gelabert, Xavier Pérez, N. Guardia, Pablo Iglesias, Òscar Labarta, Amílcar Bartolomé, F. García, L. M. Bartolomé, J. Roca, Alejandro G. Morales, M. P. Serna, C. J. |
Keywords: | Mètode de Montecarlo Espectroscòpia de raigs X Nanopartícules Metalls de transició Monte Carlo method X-ray spectroscopy Nanoparticles Transition metals |
Issue Date: | 4-Apr-2011 |
Publisher: | American Institute of Physics |
Abstract: | The magnetic behavior of Fe3-xO4 nanoparticles synthesized by either high-temperature decomposition of an organic iron precursor or low-temperature coprecipitation in aqueous conditions is compared. Transmission electron microscopy, x-ray absorption spectroscopy, x-ray magnetic circular dichroism, and magnetization measurements show that nanoparticles synthesized by thermal decomposition display high crystal quality and bulklike magnetic and electronic properties, while nanoparticles synthesized by coprecipitation show much poorer crystallinity and particlelike phenomenology, including reduced magnetization, high closure fields, and shifted hysteresis loops. The key role of the crystal quality is thus suggested, because particlelike behavior for particles larger than about 5 nm is observed only when the particles are structurally defective. These conclusions are supported by Monte Carlo simulations. It is also shown that thermal decomposition is capable of producing nanoparticles that, after further stabilization in physiological conditions, are suitable for biomedical applications such as magnetic resonance imaging or biodistribution studies. |
Note: | Reproducció del document publicat a: https://doi.org/10.1063/1.3559504 |
It is part of: | Journal of Applied Physics, 2011, vol. 109, num. 7, p. 07B524-1 -07B524-6 |
URI: | http://hdl.handle.net/2445/129629 |
Related resource: | https://doi.org/10.1063/1.3559504 |
ISSN: | 0021-8979 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
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586429.pdf | 1.23 MB | Adobe PDF | View/Open |
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