Université de Fribourg

Dynamical and structural signatures of the glass transition in emulsions

Zhang, Chi ; Gnan, Nicoletta ; Mason, Thomas G ; Zaccarelli, Emanuela ; Scheffold, Frank

In: Journal of Statistical Mechanics: Theory and Experiment, 2016, vol. 2016, no. 9, p. 094003

We investigate structural and dynamical properties of moderately polydisperse emulsions across an extended range of droplet volume fractions phgr, encompassing fluid and glassy states up to jamming. Combining experiments and simulations, we show that when phgr approaches the glass transition volume fraction ${{\phi}_{g}}$ , dynamical heterogeneities and amorphous order arise within the...

Université de Fribourg

Effective interactions between soft-repulsive colloids: Experiments, theory, and simulations

Mohanty, Priti S. ; Paloli, Divya ; Crassous, Jérôme J. ; Zaccarelli, Emanuela ; Schurtenberger, Peter

In: The Journal of Chemical Physics, 2014, vol. 140, no. 9, p. 094901

We describe a combined experimental, theoretical, and simulation study of the structural correlations between cross-linked highly monodisperse and swollen Poly(N-isopropylacrylamide) microgel dispersions in the fluid phase in order to obtain the effective pair-interaction potential between the microgels. The density-dependent experimental pair distribution functions g(r)’s are deduced from real...

Université de Fribourg

Cluster-Driven dynamical arrest in concentrated lysozyme solutions

Cardinaux, Frédéric ; Zaccarelli, Emanuela ; Stradner, Anna ; Bucciarelli, Saskia ; Farago, Bela ; Egelhaaf, Stefan U. ; Sciortino, Francesco ; Schurtenberger, Peter

In: The Journal of Physical Chemistry B, 2011, vol. 115, no. 22, p. 7227–7237

We present a detailed experimental and numerical study of the structural and dynamical properties of salt-free lysozyme solutions. In particular, by combining small-angle X-ray scattering (SAXS) data with neutron spin echo (NSE) and rheology experiments, we are able to identify that an arrest transition takes place at intermediate densities, driven by the slowing down of the cluster motion. Using...