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    Université de Fribourg

    Relationship between rheology and structure of interpenetrating, deforming and compressing microgels

    Conley, Gaurasundar M. ; Zhang, Chi ; Aebischer, Philippe ; Harden, James L. ; Scheffold, Frank

    In: Nature Communications, 2019, vol. 10, no. 1, p. 2436

    Thermosensitive microgels are widely studied hybrid systems combining properties of polymers and colloidal particles in a unique way. Due to their complex morphology, their interactions and packing, and consequentially the viscoelasticity of suspensions made from microgels, are still not fully understood, in particular under dense packing conditions. Here we study the frequency-dependent...

    Université de Fribourg

    Structure and sedimentation kinetics of dense suspensions of fibroblast cells

    Zenuni, Arbnor ; Zhang, Chi ; Haeni, Laetitia ; Rothen-Rutishauser, Barbara ; Scheffold, Frank

    In: CHIMIA International Journal for Chemistry, 2019, vol. 73, no. 1, p. 43–46

    We investigate the structure and the dynamics of dense suspensions of NIH 3T3 fibroblast cells. Using two-photon microscopy we obtain three dimensional (3D) images from which the size and the packing structure of the dense cell suspensions can be extracted. In addition, we analyse the global time-dependent behaviour of the suspensions by time-lapse measurements of cell sedimentation. Since...