Influence of polymer excluded volume on the phase behavior of colloid-polymer mixtures

Abstract

We determine the depletion-induced phase-behavior of hard sphere colloids and interacting polymers by large-scale Monte Carlo simulations using very accurate coarse-graining techniques. A comparison with standard Asakura-Oosawa model theories and simulations shows that including excluded volume interactions between polymers leads to qualitative differences in the phase diagrams. These effects become increasingly important for larger relative polymer size. Our simulations results agree quantitatively with recent experiments.

5 pages, 4 figures submitted to Physical Review Letters

References in corpus (5)

• Polymer induced depletion potentials in polymer-colloid mixtures
• How to derive and parameterize effective potentials in colloid-polymer mixtures
• Effective potentials for polymers and colloids: Beyond the van der Waals picture of fluids?
• Many-body interactions and correlations in coarse-grained descriptions of polymer solutions
• Phase separation in mixtures of colloids and long ideal polymer coils

Cited by in corpus (52)

• Representability problems for coarse-grained water potentials
• Colloid-polymer mixtures in the protein limit
• The fluid-fluid interface in a model colloid-polymer mixture: Application of grand canonical Monte Carlo to asymmetric binary mixtures
• Dynamic density functional study of a driven colloidal particle in polymer solutions
• Critical phenomena in colloid-polymer mixtures: interfacial tension, order parameter, susceptibility and coexistence diameter
• Influence of solvent quality on effective pair potentials between polymers in solution
• Finite size effects on liquid-solid phase coexistence and the estimation of crystal nucleation barriers
• Systematic characterization of thermodynamic and dynamical phase behavior in systems with short-ranged attraction
• Statics and Dynamics of Colloid-Polymer Mixtures Near Their Critical Point of Phase Separation: A Computer Simulation Study of a Continuous AO Model
• Effects of colloid polydispersity on the phase behaviour of colloid-polymer mixtures
• Phase behavior and structure of model colloid-polymer mixtures confined between two parallel planar walls
• Coarse-graining strategies in polymer solutions
• Wall-Fluid and Liquid-Gas Interfaces of Model Colloid-Polymer Mixtures by Simulation and Theory
• Thermodynamic perturbation theory of the phase behaviour of colloid / interacting polymer mixtures
• The Asakura-Oosawa model in the protein limit: the role of many-body interactions
• How soft repulsion enhances the depletion mechanism
• Mixtures of Charged Colloid and Neutral Polymer: Influence of Electrostatic Interactions on Demixing and Interfacial Tension
• Demixing in athermal mixtures of colloids and excluded-volume polymers from a density functional theory
• Polymer Crowding and Shape Distributions in Polymer-Nanoparticle Mixtures
• Excluded volume causes integer and fractional plateaus in colloidal ratchet currents
• Effect of excluded volume interactions on the interfacial properties of colloid-polymer mixtures
• A structural comparison of models of colloid-polymer mixtures
• Simulation and theory of fluid demixing and interfacial tension of mixtures of colloids and non-ideal polymers
• Influence of Polymer Shape on Depletion Potentials and Crowding in Colloid-Polymer Mixtures
• Accurate description of bulk and interfacial properties in colloid-polymer mixtures
• Effects of polymer polydispersity on the phase behaviour of colloid-polymer mixtures
• Preferential localization of the bacterial nucleoid
• Effect of polymer-polymer interactions on the surface tension of colloid-polymer mixtures
• Depletion-Induced Forces and Crowding in Polymer-Nanoparticle Mixtures: Role of Polymer Shape Fluctuations and Penetrability
• Crowding of Polymer Coils and Demixing in Nanoparticle-Polymer Mixtures
• Polymers as compressible soft spheres
• Capillary Condensation and Interface Structure of a Model Colloid-Polymer Mixture in a Porous Medium
• A density--functional study of interfacial properties of colloid--polymer mixtures
• Polymer solutions: from hard monomers to soft polymers
• Contact Angle of the Colloidal Liquid-Gas Interface and a Hard Wall
• Equilibrium properties of highly asymmetric star-polymer mixtures
• Density functional theory and demixing of binary hard rod-polymer mixtures
• Coarse-graining polymer solutions: a critical appraisal of single- and multi-site models
• Composition inversion in mixtures of binary colloids and polymer
• Wetting in mixtures of colloids and excluded-volume polymers from density functional theory
• Phase diagram of mixtures of colloids and polymers in the thermal crossover from good to $\theta$ solvent
• Fluid phase separation inside a static periodic field: an effectively two-dimensional critical phenomenon
• Virial coefficients and demixing in the Asakura-Oosawa model
• Lattice density functional for colloid-polymer mixtures: Multi-occupancy versus Highlander version
• Accurate coarse-grained models for mixtures of colloids and linear polymers under good-solvent conditions
• Colloids and polymers in random colloidal matrices: demixing under good-solvent conditions
• Influence of Solvent Quality on Depletion Potentials in Colloid-Polymer Mixtures
• Confined crowded polymers near attractive surfaces
• Exploring Fluctuations and Phase Equilibria in Fluid Mixtures via Monte Carlo Simulation
• Fluid-fluid demixing curves for colloid-polymer mixtures in a random colloidal matrix
• Phase stability of a reversible supramolecular polymer solution mixed with nanospheres
• Excluded volume geometry and packing fraction in binary convex hyperparticle mixtures