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

doi:10.1021/nn901597a

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 journal › Article › peer-review

86 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 language	English (US)
Pages (from-to)	1873-1878
Number of pages	6
Journal	ACS Nano
Volume	4
Issue number	4
DOIs	https://doi.org/10.1021/nn901597a
State	Published - Apr 27 2010
Externally published	Yes

Keywords

Colloidal nanoparticles
Directed assembly
Magnetic field
Magnetic nanocomposites
Nanowires
Polymers

ASJC Scopus subject areas

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/nn901597a

Cite this

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title = "Dynamical formation of spatially localized arrays of aligned nanowires in plastic films with magnetic anisotropy",

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.",

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AU - Fragouli, Despina

AU - Buonsanti, Raffaella

AU - Bertoni, Giovanni

AU - Sangregorio, Claudio

AU - Innocenti, Claudia

AU - Falqui, Andrea

AU - Gatteschi, Dante

AU - Cozzoli, Pantaleo Davide

AU - Athanassiou, Athanassia

AU - Cingolani, Roberto

PY - 2010/4/27

Y1 - 2010/4/27

N2 - 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.

AB - 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.

KW - Colloidal nanoparticles

KW - Directed assembly

KW - Magnetic field

KW - Magnetic nanocomposites

KW - Nanowires

KW - Polymers

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

Abstract

Keywords

ASJC Scopus subject areas

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