Nonuniversal routes to universality: Critical phenomena in colloidal dispersions

Autor:	Pini, D., Verso, F. Lo, Tau, M., Parola, A., Reatto, L.
Rok vydání:	2008
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.100.055703
Popis:	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. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0801.3244 Zobrazit plný text záznamu View this record from Arxiv