Alternative view of dynamic arrest in colloid-polymer mixtures.
Colloid-polymer mixtures are frequently viewed as an effective one-component fluid (the colloid) with polymer-mediated depletion interactions. This view, together with conventional mode coupling theory, constitutes the current description of the reentrant glass transition experimentally observed in these systems. A more fundamental view is to consider these systems as what they actually are, namely, genuine highly size-asymmetric binary colloidal mixtures. In this Letter we demonstrate that the recently developed multicomponent self-consistent generalized Langevin equation theory of dynamic arrest correctly predicts the observed reentrance in excellent quantitative agreement with the experimental glass transition line of a colloid-polymer mixture. In this scenario the polymer plays a much more active dynamic role than in the conventional one-component description.
Juárez-Maldonado
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Instituto de Física Manuel Sandoval Vallarta, Universidad Autónoma de San Luis Potosí, Alvaro Obregón 64, 78000 San Luis Potosí, SLP, México.
Medina-Noyola
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