Dynamical formation of spatially localized arrays of aligned nanowires in plastic films with magnetic anisotropy

Despina Fragouli*, Raffaella Buonsanti, Giovanni Bertoni, Claudio Sangregorio, Claudia Innocenti, Andrea Falqui, Dante Gatteschi, Pantaleo Davide Cozzoli, Athanassia Athanassiou, Roberto Cingolani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Scopus citations

Abstract

We present a simple technique for magnetic-field-induced formation, assembling, and positioning of magnetic nanowires in a polymer film. Starting from a polymer/iron oxide nanoparticle casted solution that is allowed to dry along with the application of a weak magnetic field, nanocomposite films incorporating aligned nanocrystal-built nanowire arrays are obtained. The control of the dimensions of the nanowires and of their localization across the polymer matrix is achieved by varying the duration of the applied magnetic field, in combination with the evaporation dynamics. These multifunctional anisotropic free-standing nanocomposite films, which demonstrate high magnetic anisotropy, can be used in a wide field of technological applications, ranging from sensors to microfluidics and magnetic devices.

Original languageEnglish (US)
Pages (from-to)1873-1878
Number of pages6
JournalACS Nano
Volume4
Issue number4
DOIs
StatePublished - Apr 27 2010
Externally publishedYes

Keywords

  • Colloidal nanoparticles
  • Directed assembly
  • Magnetic field
  • Magnetic nanocomposites
  • Nanowires
  • Polymers

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)
  • Physics and Astronomy(all)

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