Observations upon the dynamic structure factor of interacting spherical polyelectrolytes
- 1 September 1983
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 79 (5), 2325-2332
- https://doi.org/10.1063/1.446037
Abstract
Experimental studies are reported on the light‐scattering spectrum of 0.038 μ carboxylate‐modified polystyrene latex spheres in deionized water. In concentrated suspensions, the long‐time decay of the two‐particle dynamic structure factor is given by a power law (t − α) form, not by a slow exponential. Nonlinear least squares fits found α≂1.2–1.5, smaller values of α corresponding to higher sphere concentrations. The reduction of the mutual diffusion coefficient of 0.15 μ spheres in mixtures of 0.15 and 0.038 μ spheres was examined, and is interpreted in terms of the dynamic friction modification to the drag coefficients. Multiple scattering artifacts were shown to be absent with homodyne coincidence spectroscopy.Keywords
This publication has 31 references indexed in Scilit:
- Light scattering spectrum of a suspension of interacting Brownian macromoleculesThe Journal of Chemical Physics, 1981
- Contribution of nonhydrodynamic interactions to the concentration dependence of the friction factor of the mutual diffusion coefficientThe Journal of Chemical Physics, 1981
- Quasielastic light scattering study of charged polystrene particles in waterThe Journal of Chemical Physics, 1978
- Contribution of Slow Charge Fluctuations to Light Scattering from a Monodisperse Solution of MacromoleculesMacromolecules, 1976
- Correlations for interacting Brownian particlesThe Journal of Chemical Physics, 1976
- The dynamics of interacting Brownian particlesJournal of Physics A: General Physics, 1975
- Fluorescence correlation spectroscopy and nonideal solutionsBiopolymers, 1975
- The effect of electric charge on the diffusion of macromoleculesThe Journal of Chemical Physics, 1974
- Effects of intermacromolecular interactions on diffusion. II. Three-component solutionsThe Journal of Chemical Physics, 1974
- Self-consistent extended Hückel theory. IIThe Journal of Chemical Physics, 1974