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

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-01167825
Contributor : Stéphane Toulin <>
Submitted on : Wednesday, June 24, 2015 - 5:44:51 PM
Last modification on : Thursday, January 11, 2018 - 6:28:09 AM

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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, American Chemical Society, 2015, 31 (24), pp.6675-6680. ⟨10.1021/acs.langmuir.5b00942⟩. ⟨hal-01167825⟩

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