Dynamical formation of spatially localized arrays of aligned nanowires in plastic films with magnetic anisotropy.
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.
Fragouli
Despina
D
Center for Bio-Molecular Nanotechnologies (CBN) of IIT@NNL-UniLe-Lecce, via Barsanti c/o STAMMS, Arnesano 73010 Lecce, Italy. despina.fragouli@unile.it
Buonsanti
Raffaella
R
Bertoni
Giovanni
G
Sangregorio
Claudio
C
Innocenti
Claudia
C
Falqui
Andrea
A
Gatteschi
Dante
D
Cozzoli
Pantaleo Davide
PD
Athanassiou
Athanassia
A
Cingolani
Roberto
R
D016880:Anisotropy; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D053770:Nanowires / Q000737:chemistry*; D010969:Plastics / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014783:Viscosity; D014835:Volatilization
D010969:Plastics; D012997:Solvents