Stabilization and Controlled Association of Inorganic Nanoparticles using Block Copolymers Auteur(s): Yokota K., Morvan M., Berret J. -F., Oberdisse J. (Article) Publié: Europhysics Letters (Epl), vol. 69 p.284-290 (2005) Texte intégral en Openaccess : Ref HAL: hal-00008607_v1 Ref Arxiv: cond-mat/0411668 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote Résumé: We report on the structural properties of mixed aggregates made from rare-earth inorganic nanoparticles (radius 20 Angstroms) and polyelectrolyte-neutral block copolymers in aqueous solutions. Using scattering experiments and Monte Carlo simulations, we show that these mixed aggregates have a hierarchical core-shell microstructure. The core is made of densely packed nanoparticles and it is surrounded by a corona of neutral chains. This microstructure results from a process of controlled association and confers to the hybrid aggregates a remarkable colloidal stability. Commentaires: 14 pages, 5 figures |