Dipolar-driven formation of cobalt nanoparticle chains in polyethylene films

Resumo

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. (C) 2015 Elsevier B.V. All rights reserved.

Ficha do documento

Tipo

Artigo científico

Ano

2015

Instituição

Elsevier Science Sa

Fonte

Repositório da FGV

Idioma

Inglês

Acesso

Acesso restrito

DOI

10.1016/j.matchemphys.2015.05.062

Identificador

oai:repositorio.fgv.br:10438/23491

Palavras-chave

Magnetic materialsNanostructuresMonte Carlo methodHysteresisPolymersCiências sociaisNanoestruturaMonte Carlo, Método dePolímeros