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Séminaire : Functional electric-magnetic nanofibers produced by electrospinning le 22 juin 2012
le 22 juin 2012
Professeur Bernardo Almeida, Univ Minho, Dept Phys, P-4710057 Braga, Portugal
In recent years the electrospinning technique, for the production of nanoscopic wires/fibers, has found increasing importance among the materials research community because of its simplicity and low-cost availability. It relies on the high voltage jet drawing of a polymer solution or melt through a capillary (needle). By dispersing suitable nanoparticles on the precursor solution, high aspect-ratio functionalized nanofibers can be produced, with diameters down to 100 nm or below and lengths up to millimeters or more.
Here we present the fabrication and characterization of a number of functional nanostructures (single fibers and aligned arrays) produced by the electrospinning technique, as well as potential applications. Special attention is paid to ferroelectric and/or piezoelectric materials which can be used as building blocks for self-assembled nanoelectronic devices, all-organic electronics and optoelectronics. The obtained results include nanofibers of oxides - e.g. ferroelectric BaTiO3 and ferromagnetic CoFe2O4, or organic ferroelectric/piezoelectric materials such as triglycine sulphate. The results present a great potential for the application of electrospinning as an effective tool for producing a wide range of functional and multifunctional low-dimensional nanostructured materials.
Le Professeur Bernardo Almeida est invité par Jean-Eric Wegrowe.
- Lieu(x) :
- Salle du PMC (n°05-30-29)