Isostructural solid–solid coexistence of colloid–polymer mixtures

[Display omitted] •Phase behavior of penetrable hard spheres plus hard spheres from free-volume theory.•Improved description of free-volume available for penetrable hard spheres in the solid phase.•Depletion-driven isostructural solid-solid transition. Hard spheres mixed with penetrable hard spheres...

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Bibliographic Details
Published in:Chemical physics letters 2018-10, Vol.709, p.16-20
Main Authors: García, Álvaro González, Opdam, Joeri, Tuinier, Remco, Vis, Mark
Format: Article
Language:English
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Summary:[Display omitted] •Phase behavior of penetrable hard spheres plus hard spheres from free-volume theory.•Improved description of free-volume available for penetrable hard spheres in the solid phase.•Depletion-driven isostructural solid-solid transition. Hard spheres mixed with penetrable hard spheres display an isostructural solid–solid transition. This phase transition is fully driven by the entropy gain of the depletants without invoking explicit pair potentials between the colloidal particles. The solid–solid phase coexistence terminates at a critical endpoint with a size ratio q≈0.09. Colloid–polymer mixtures are an excellent candidate for the experimental realization of this intricate solid–solid transition, first predicted by Bolhuis and Frenkel for hard spheres with short range pair attractions [PRL 72, 2211–2214 (1994)].
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2018.08.028