March 31, 2010 Journal article Open Access

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

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    <subfield code="a">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.</subfield>
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