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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: POSTERS Driven Soft Matter
CPP 20.37: Poster
Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A
Towards magnetic response of composite materials: Nanoparticle incorporation into polymer matrix — •Marta Kolasinska1, Rumen Krastev1, Thomas Gutberlet2, and Helmuth Möhwald1 — 1Max Planck Institut für Kolloid- und Grenzflächenforschung, 14424 Potsdam/Golm, Deutschland — 2Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
Nanometer thick polymer materials with embedded nanoinhomogeneities possess a number of specific properties which depend strongly on the inter particle distances in the matrix. Fabrication of well-defined nanostructures is a prerequisites to obtain materials of desired functions.
We incorporated magnetite nanoparticles onto/into polyelectrolyte multilayers (PEMs) and found that a 2D ordering of particles into *monolayers* depends on treatment of underlying PEM changing it from metastable to equilibrium. The metastable glassy PEM were permeable for the nanoparticles while in the melted PEM the particle penetration was blocked. They were concentrated at the film *surface* forming 2D ordered layer. The magnetic moment of the sample was checked by neutron reflectometry. We found pronounced magnetic response in the reflectivity curves. This proves that structures with appropriate concentration of magnetic particles were achieved which makes such materials suitable to prepare new magnetic responsible materials.