Journal
JOURNAL OF APPLIED CRYSTALLOGRAPHY
Volume 43, Issue -, Pages 970-980Publisher
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S002188981002724X
Keywords
diffusion; charge-stabilized colloidal particles; self-diffusion; sedimentation
Categories
Funding
- International Helmholtz Research School of Biophysics and Soft Matter (IHRS BioSoft)
- SeCyT-UNC
- CONICET
- Deutsche Forschungsgemeinschaft [SFB-TR6, B2]
Ask authors/readers for more resources
Analytical theory and Stokesian dynamics simulations are used in conjunction with dynamic light scattering to investigate the role of hydrodynamic interactions in short-time diffusion in suspensions of charge-stabilized colloidal particles. The particles are modeled as solvent-impermeable charged spheres, repelling each other via a screened Coulomb potential. Numerical results for self-diffusion and sedimentation coefficients, as well as hydrodynamic and short-time diffusion functions, are compared with experimental data for a wide range of volume fractions. The theoretical predictions for the generic behavior of short-time properties obtained from this model are shown to be in full accord with experimental data. In addition, the effects of microion kinetics, nonzero particle porosity and residual attractive forces on the form of the hydrodynamic function are estimated. This serves to rule out possible causes for the strikingly small hydrodynamic function values determined in certain synchrotron radiation experiments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available