Nanochains formation of superparamagnetic nanoparticles

G. Bertoni*, Bruno Torre, Andrea Falqui, D. Fragouli, A. Athanassiou, R. Cingolani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We present simulations on the aggregation of nanometer sized polydispersed superparamagnetic particles under the application of an external magnetic field. We make use of a Monte Carlo method, using a cluster-moving approach, as previously used in literature for ferrofluids. van der Waals attraction and magnetic anisotropy are taken into account in the simulations. Chains elongated in the field direction are formed. The results are in good agreement with recent experimental results on nanochains made of iron oxide nanoparticles into polymer matrix, obtained with the application of a magnetic field during film deposition. The magnetization anisotropy of the nanocomposite film under dc magnetic field can be predicted within this simple model.

Original languageEnglish (US)
Pages (from-to)7249-7254
Number of pages6
JournalJournal of Physical Chemistry C
Volume115
Issue number15
DOIs
StatePublished - Apr 21 2011

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

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