Soret Effect in Interacting Micellar Solutions
- 2 May 2002
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (20), 208302
- https://doi.org/10.1103/physrevlett.88.208302
Abstract
We show that electrostatic effects have a dramatic influence on thermal diffusion of charged micelles. In the dilute regime, the Soret coefficient strongly decreases with the solution ionic strength, and scales as the square of the Debye-Hückel length. Yet, collective effects yield a reversed scenario even at fairly low surfactant concentration. We find that single-particle behavior can be explained using an interfacial tension mechanism proposed by Ruckenstein, which also fairly accounts for collective effects and opens the way to a general picture of thermal diffusion in disperse systems.Keywords
This publication has 14 references indexed in Scilit:
- Thermal and mass diffusion in a semidilute good solvent-polymer solutionThe Journal of Chemical Physics, 1999
- Nonequilibrium fluctuations in time-dependent diffusion processesPhysical Review E, 1998
- Soret coefficient of nanoparticles in ferrofluids in the presence of a magnetic fieldPhysics of Fluids, 1998
- Role of thermotransport (Soret effect) in macrosegregation during eutectic/off-eutectic directional solidificationJournal of Crystal Growth, 1998
- Time-dependent Soret transport: Applications to brine and magmaChemical Geology, 1992
- Thermophoretic effect of particle deposition on a free standing semiconductor wafer in a clean roomJournal of Aerosol Science, 1991
- Separation of seawater by Soret diffusionDeep Sea Research Part A. Oceanographic Research Papers, 1985
- Can phoretic motions be treated as interfacial tension gradient driven phenomena?Journal of Colloid and Interface Science, 1981
- Quasi-elastic light scattering study of intermicellar interactions in aqueous sodium dodecyl sulfate solutionsThe Journal of Physical Chemistry, 1981
- Soret-Type Motion of Macromolecules in SolutionPhysical Review Letters, 1977