Polymer-Enforced Crystallization of a Eutectic Binary Hard Sphere Mixture

Details Polymer-Enforced Crystallization of a Eutectic Binary Hard Sphere Mixture Polymer-Enforced Crystallization of a Eutectic Binary Hard Sphere Mixture

2010-12-13

arxiv.org/abs/1012.2700v2

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 Figures

Scientific paper

We prepared a buoyancy matched binary mixture of polydisperse polystyrene microgel spheres of size ratio 0.785 and at a volume fraction of 0.567 just below the kinetic glass transition. In line with theoretical expectations, a eutectic phase behavior was observed, but only a minor fraction of the samples crystallized at all. By adding a short non-adsorbing polymer we enforce inter-species fractionation into coexisting pure component crystals, which in turn also shows signs of intra-species fractionation. We show that in formerly inaccessible regions of the phase diagram binary hard sphere physics is made observable using attractive hard spheres.

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