Static structure factors of binary suspensions of charged polystyrene spheres: experiment against theory and computer simulation
- 17 June 1991
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 3 (24), 4459-4475
- https://doi.org/10.1088/0953-8984/3/24/015
Abstract
The microscopic static structure of dilute binary colloidal suspensions, for compositions covering the full molar fraction range, are investigated using static light scattering experiments. The mixtures of liquid-like ordered suspensions are made from charged polystyrene particles having averaged radii of 42 nm and 65 nm. The data are compared with the results of integral equation theories using the extended re-scaled mean spherical approximation and the hypernetted chain approximation and Rogers-Young closure schemes, and to Monte Carlo computer simulations. The values of charges needed in the Yukawa-type pair potentials are determined from fits to the scattering data of the pure components, and they are kept constant for the mixtures. Of the various theoretical schemes used, the Rogers-Young method is found to be the most satisfactory. In order to fully describe the experimental data, it is necessary to take the intrinsic polydispersity of the two pure components into account.Keywords
This publication has 17 references indexed in Scilit:
- Rescaled mean spherical approximation for colloidal mixturesPhysica A: Statistical Mechanics and its Applications, 1990
- Structure and self-diffusion in dilute suspensions of polystyrene spheres: Experiment vs. computer simulation and theoryPhysica A: Statistical Mechanics and its Applications, 1988
- Equilibrium properties of suspensionsAdvances in Colloid and Interface Science, 1984
- Liquid-like structure of charged colloidal dispersions in the presence of screening ionsMolecular Physics, 1983
- Generalized hydrodynamics of systems of Brownian particlesAdvances in Physics, 1983
- Dynamics of colloidal crystals and colloidal liquidsJournal of Physics A: General Physics, 1982
- The k dependence of the long-time diffusion in systems of interacting Brownian particlesJournal of Physics A: General Physics, 1979
- Correlations for interacting Brownian particles. IIThe Journal of Chemical Physics, 1978
- Intensity fluctuation spectroscopy of charged Brownian particles: the coherent scattering functionJournal of Physics A: General Physics, 1978
- Correlations for interacting Brownian particlesThe Journal of Chemical Physics, 1976