Hierarchical assembly of magnetic L10-ordered FePt nanoparticles in block copolymer thin films
Langue
en
Article de revue
Ce document a été publié dans
Journal of Materials Chemistry C. 2013, vol. 1, n° 7, p. 1317-1321
Royal Society of Chemistry
Résumé en anglais
The self-assembly process and local magnetic properties of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with L10-ordered FePt nanoparticles are studied. During the solvent annealing ...Lire la suite >
The self-assembly process and local magnetic properties of asymmetric poly(styrene-block-ethylene oxide) (PS-b-PEO) copolymer thin films blended with L10-ordered FePt nanoparticles are studied. During the solvent annealing process, it is shown that L10-ordered FePt nanoparticles covered with short dopamine-terminated-methoxy poly(ethylene oxide) (mPEO-Dopa) are localized within spherical PEO domains having an inter-domain spacing of about 43.2 nm. The magnetic properties of the nanocomposite thin films were then investigated using magnetic force microscopy (MFM). MFM results reveal that each spot (magnetic signal), resulting from the presence of ferromagnetic NPs (coercive field, Hc [similar] 2000 Oe at 300 K), is fully contained in a PEO sphere leading to readily discernible magnetic nanodomains (bits).< Réduire
Mots clés en anglais
Polymers
Nanoparticles
Self-assembly
Magnetism
Thin films
Origine
Importé de halUnités de recherche