| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sollich, Peter
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2022Delayed elastic contributions to the viscoelastic response of foamscitations
- 2018On the existence of thermodynamically stable rigid solidscitations
- 2017Aging and linear response in the Hébraud–Lequeux model for amorphous rheologycitations
- 2015Non-affine fluctuations and the statistics of defect precursors in the planar honeycomb latticecitations
- 2012Unified study of glass and jamming rheology in soft particle systemscitations
- 2006Simulation estimates of cloud points of polydisperse fluids
- 2006Simulation estimates of cloud points of polydisperse fluidscitations
- 2006Phase behavior of weakly polydisperse sticky hard spheres: Perturbation theory for the Percus-Yevick solution
- 2005Effects of polymer polydispersity on the phase behaviour of colloid-polymer mixturescitations
- 2005Dynamic Heterogeneity in the Glauber-Ising chain
- 2005Liquid-vapour phase behaviour of a polydisperse Lennard-Jones fluidcitations
- 2005Effects of colloid polydispersity on the phase behavior of colloid-polymer mixturescitations
- 2003Fluctuation-dissipation relations in the nonequilibrium critical dynamics of Ising modelscitations
- 2003Equivalence of driven and aging fluctuation-dissipation relations in the trap modelcitations
- 2002Observable dependence of fluctuation-dissipation relations and effective temperaturescitations
- 2001Predicting phase equilibria in polydisperse systemscitations
- 2000Aging and rheology in soft materialscitations
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article
Effects of colloid polydispersity on the phase behavior of colloid-polymer mixtures
Abstract
We study theoretically the equilibrium phase behavior of a mixture of polydisperse hard-sphere colloids and monodisperse polymers, modeled using the Asakura-Oosawa model [S. Asakura and F. Oosawa, J. Chem. Phys. 22, 1255 (1954)] within the free volume approximation of H. N. W. Lekkerkerker, W. C. K. Poon, P. N. Pusey, A. Stroobants, and P. B. Warren [Europhys. Lett. 20, 559 (1992)]. We compute full phase diagrams in the plane of colloid and polymer volume fractions, using the moment free energy method. The intricate features of phase separation in pure polydisperse colloids combine with the appearance of polymer-induced gas-liquid coexistence to give a rich variety of phase diagram topologies as the polymer-colloid size ratio xi and the colloid polydispersity delta are varied. Quantitatively, we find that polydispersity disfavors fluid-solid against gas-liquid separation, causing a substantial lowering of the threshold value xi(c) above which stable two-phase gas-liquid coexistence appears. Phase splits involving two or more solids can occur already at low colloid concentration, where they may be kinetically accessible. We also analyze the strength of colloidal size fractionation. When a solid phase separates from a fluid, its polydispersity is reduced most strongly if the phase separation takes place at low colloid concentration and high polymer concentration, in agreement with experimental observations. For fractionation in gas-liquid coexistence we likewise find good agreement with experiment, as well as with perturbative theories for near-monodisperse systems. (C) American Institute of Physics