Glasses and Gels

Arrest transitions in model colloid-polymer mixtures

We use colloid polymer mixtures as a model system to understand arrest transitions of weakly attractive colloids at intermediate volume fractions.

Arrested phase separation

A new scenario for structural and dynamic arrest. We demonstrate that colloidal suspensions at intermediate volume fractions can undergo an arrest transition that is driven by phase separation. More provocatively stated: the equilibrium phase behavior can drive the system into a nonequilibrium arrested state.

CARS microscopy image of colloid-polymer mixture in an arrested state.


“Soft Colloids make Strong Glasses”
J. Mattsson, H. M. Wyss, A. Fernandez-Nieves, K. Miyazaki, Z. Hu, D. R. Reichman, and D. A. Weitz
Nature 462 7269, 83 (2009)
“Temperature-controlled transitions between glass, liquid and gel states in dense p-NIPA suspensions”
G. Romeo, A. Fernandez-Nieves, H.M. Wyss, D. Acierno, and D.A. Weitz
Advanced Materials 22, 3441-3445 (2010)
“Arrested fluid-fluid phase separation in depletion systems: Implications of the characteristic length on gel formation and rheology”
J. C. Conrad, H. M. Wyss, S. Manley, V. Trappe, K. Miyazaki, L. J. Kaufman, A. Schofield, D. R. Reichman, and D. A. Weitz
Journal of Rheology 54 (2), 421 (2010)
“Glasslike Arrest in Spinodal Decomposition as a Route to Colloidal Gelation”
S. Manley, H. M. Wyss, K. Miyazaki, J. C. Conrad, V. Trappe, L. J. Kaufman, D. R. Reichman, and D. A. Weitz
Physical Review Letters 95 238302 (2005)