Nonuniversal routes to universality: Critical phenomena in colloidal dispersions
arXiv:0801.3244 · doi:10.1103/PhysRevLett.100.055703
Abstract
We investigate critical phenomena in colloids by means of the renormalization-group based hierarchical reference theory of fluids (HRT). We focus on three experimentally relevant model systems: namely, the Asakura-Oosawa model of a colloidal dispersion under the influence of polymer-induced attractive depletion forces; fluids with competing short-range attractive and longer-range repulsive interactions; solutions of star-polymers whose pair potential presents both an attractive well and an ultrasoft repulsion at shorter distance. Our results show that the ability to tune the effective interactions between colloidal particles allows one to generate a variety of crossovers to the asymptotic critical behavior, which are not observed in atomic fluids.
arXiv comment4 pages, 3 figures
References in corpus (9)
- Equilibrium cluster phases and low-density arrested disordered states: The role of short-range attraction and long-range repulsion
- Dynamical Arrest in Attractive Colloids: The Effect of Long-Range Repulsion
- Modeling Equilibrium Clusters in Lysozyme Solutions
- The fluid-fluid interface in a model colloid-polymer mixture: Application of grand canonical Monte Carlo to asymmetric binary mixtures
- A model colloidal fluid with competing interactions: bulk and interfacial properties
- Avoided Critical Behavior in O(n) Systems
- Freezing and correlations in fluids with competing interactions
- Critical behavior in colloid-polymer mixtures: theory and simulation
- Equilibrium properties of highly asymmetric star-polymer mixtures