Dipolar-driven formation of cobalt nanoparticle chains in polyethylene films
Author
dc.contributor.author
Vargas, E.
Author
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Melo, W. W. M.
Author
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Allende, S.
Author
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Neumann, R. F.
Author
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Denardin, J. C.
Author
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Altbir, D.
Author
dc.contributor.author
Bahiana, M.
Admission date
dc.date.accessioned
2015-11-26T14:45:04Z
Available date
dc.date.available
2015-11-26T14:45:04Z
Publication date
dc.date.issued
2015
Cita de ítem
dc.identifier.citation
Materials Chemistry and Physics 162 (2015) 229-233
en_US
Identifier
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DOI: 10.1016/j.matchemphys.2015.05.062
Identifier
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https://repositorio.uchile.cl/handle/2250/135269
General note
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Artículo de publicación ISI
en_US
Abstract
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Using a simple method we produce polyethylene film with embedded chains of cobalt nanoparticles. The crystalline magnetic nanoparticles were synthesized through a simple chemical reduction method at room temperature using ultrasonic assistance. These particles were incorporated in a polyethylene matrix using a solution blending mechanism under an external magnetic field. The morphology and magnetic properties of Co nanoparticle aggregates were studied experimentally and by means of Monte Carlo simulations, showing a chain-like structures due to the strong dipolar interaction between aggregates. The hysteresis loops reveal typical ferromagnetic behavior at room temperature and magnetic anisotropy associated to a linear ordering of particles into the polymeric matrix. Numerical results confirmed the chain-like character of the aggregates and that an external magnetic field aligns them along its direction. The low-cost of the fabrication process of these polymeric magnetic films give them a strong potential for industrial and technological applications.