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    Université de Fribourg

    Nanoparticle hybrid systems synthesis of a tailored composite model

    Dietsch, Hervé ; Schurtenberger, Peter (Dir.)

    Thèse de doctorat : Université de Fribourg, 2006 ; Nr. 1537.

    Spherical and monodisperse SiO2 silica colloidal particles in a range of 30 nm to 1 μm are prepared using sol-gel processes. Their surfaces are functionalized with silane agent allowing covalent bond formation or not with macromolecules chains of a crosslinked elastomer (PMMA or PAA), polymerized under UV light. In order to track particle under shear, there is a need to produce fluorescent...

    Université de Fribourg

    Time-resolved investigation of aggregation and sol-gel transition in colloidal suspensions

    Vavrin, Ronny ; Schurtenberger, Peter (Dir.)

    Thèse de doctorat : Université de Fribourg, 2005 ; Nr. 1497.

    In this work we present a study of the aggregation and sol-gel transition of colloidal suspensions using a wide range of experimental techniques, where some of them were modified or developed especially for this purpose. Covering all relevant time and length scales, we investigate in the first part of this work a model system which undergoes a sol-gel transition in the hope to gain further...