Accurate description of bulk and interfacial properties in colloid-polymer mixtures

Details Accurate description of bulk and interfacial properties in colloid-polymer mixtures Accurate description of bulk and interfacial properties in colloid-polymer mixtures

2005-05-10

arxiv.org/abs/cond-mat/0505234v1

Phys. Rev. E 72, 030401(R) (2005)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevE.72.030401

Large-scale Monte Carlo simulations of a phase-separating colloid-polymer mixture are performed and compared to recent experiments. The approach is based on effective interaction potentials in which the central monomers of self-avoiding polymer chains are used as effective coordinates. By incorporating polymer nonideality together with soft colloid-polymer repulsion, the predicted binodal is in excellent agreement with recent experiments. In addition, the interfacial tension as well as the capillary length are in quantitative agreement with experimental results obtained at a number of points in the phase-coexistence region, without the use of any fit parameters

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