Optimization of Magnetic Inks Made of L10-Ordered FePt Nanoparticles and Polystyrene-block-Poly(ethylene oxide) Copolymers.

Brice Basly (1) , Thomas Alnasser (1) , Karim Aissou (2, 3) , Guillaume Fleury (2, 3) , Gilles Pecastaings (2, 3) , Georges Hadziioannou (2, 3) , Etienne Duguet (1) , Graziella Goglio (1) , Stéphane Mornet (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 LCPO - Laboratoire de Chimie des polymères organiques
3 Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies

The preparation of magnetic inks stable over time made of L10-ordered FePt nanoparticles, thiol-ended poly(ethylene glycol) methyl ether (mPEO-SH) compatibilizing macromolecules and asymmetric polystyrene-block-poly(ethylene oxide) copolymers (BCP) as a subsequent self-organizing medium was optimized. It was demonstrated that the use of sacrificial MgO shells as physical barriers during the annealing stage for getting the L10-ordered state makes easier and more efficient the anchoring of compatibilizing PEO macromolecules onto the nanoparticles surface. L10-FePt grafted nanoparticles have shown a good colloidal stability and affinity with the PEO domains of the BCP leading to L10-FePt/BCP composite thin layers with individual magnetic dots dispersed in the BCP matrix.

Domaines: Matériaux

Brice Basly, Thomas Alnasser, Karim Aissou, Guillaume Fleury, Gilles Pecastaings, et al.. Optimization of Magnetic Inks Made of L10-Ordered FePt Nanoparticles and Polystyrene-block-Poly(ethylene oxide) Copolymers.. Langmuir, 2015, 31 (24), pp.6675-6680. ⟨10.1021/acs.langmuir.5b00942⟩. ⟨hal-01167825⟩