Unusual liquid phases for indented colloids with depletion interactions

Abstract

We study indented spherical colloids, interacting via depletion forces. These systems exhibit liquid-vapor phase transitions whose properties are determined by a combination of strong "lock-and-key" bonds and weaker non-specific interactions. As the propensity for lock-and-key binding increases, the critical point moves to significantly lower density, and the coexisting phases change their structure. In particular, the liquid phase is "porous", exhibiting large percolating voids. The properties of this system depend strongly on the topological structure of an underlying bond network: we comment on the implications of this fact for the assembly of equilibrium states with controlled porous structures.

arXiv comment11 pages, 9 figures

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Cited by in corpus (5)

• Assembly of nothing: Equilibrium fluids with designed structured porosity
• Coarse-grained depletion potentials for anisotropic colloids: application to lock-and-key systems
• Correction of coarse-graining errors by a two-level method: application to the Asakura-Oosawa model
• Discontinuous change from thermally- to geometrically- dominated effective interactions in colloidal solutions
• Critical point for de-mixing of binary hard spheres