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Communication Dans Un Congrès Année : 2008

Polymer stabilized clusters of superparamagnetic nanoparticles

Résumé

Mixing in aqueous solutions polyelectrolyte-neutral block copolymers with oppositely charged species, spontaneously forms stable core-shell complexes, which are electrostatically driven. We report here on the structural and orientational properties of such mixed magnetic nanoclusters made of magnetic iron oxide nanoparticles (MNP) and polyelectrolyte-neutral block copolymers. Small Angle Neutron Scattering and Transmission Electron Microscopy experiments allows to probe the innercore nanoparticle organization, leading to an average inter-particle distance and confirming the hierarchical internal structure of the clusters. Thanks to the MNP optical anisotropy, we also probe the under-magnetic field orientational properties of the core-shell clusters and their dynamical rotational relaxation.
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hal-00172363 , version 1 (02-05-2023)

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Bruno Frka-Petesic, Jérôme Fresnais, Jean-François Berret, Vincent Dupuis, Régine Perzynski, et al.. Polymer stabilized clusters of superparamagnetic nanoparticles. 12th French-Japanese Seminar on Magnetic Fluids, Jul 2007, Paris, France. pp.667-670, ⟨10.1016/j.jmmm.2008.11.021⟩. ⟨hal-00172363⟩
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