Fernandez, Patrick and Schroedle, Simon and Buchner, Richard and Kunz, Werner (2003) Micelle and solvent relaxation in aqueous sodium dodecylsulfate solutions. CHEMPHYSCHEM, 4 (10). pp. 1065-1072. ISSN 1439-4235, 1439-7641
Full text not available from this repository.Abstract
Dielectric spectra have been measured for aqueous sodium dodecylsulfate (SDS) solutions up to 0.1 molL(-1) at 25degreesC over the frequency range 0.005 less than or equal to nu GHz(-1) less than or equal to 89. The spectra exhibit two relaxation processes at approximately 0.03 GHz and 0.2 GHz associated with the presence of micelles in addition to the dominant solvent relaxation process at approximately 18 GHz and a small contribution at approximately 1.8 GHz due to H2O molecules hydrating the micelles. Detailed analysis reveals that the micelles bind 20 water molecules per SDS unit, but not as strongly as trimethylalkylammonium halide surfactants do. The relaxation times and amplitudes of both micelle relaxation processes can be simultaneously analysed with the theory of Grosse, yielding the effective volume of a SDS unit in the micelle and the lateral diffusion coefficent of the bound counterions. The findings of this investigation fully corroborate recent molecular dynamics simulations on structure and dynamics of SDS micelles.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MOLECULAR-DYNAMICS SIMULATION; IONIC SURFACTANT MICELLES; DIELECTRIC-RELAXATION; DETERGENT CONCENTRATION; ELECTROLYTE-SOLUTIONS; CATIONIC SURFACTANTS; NEUTRON-SCATTERING; WATER; SPECTROSCOPY; PERMITTIVITY; aggregation; dielectric relaxation; hydration; micelles; molecular dynamics |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 28 Jul 2021 10:41 |
| Last Modified: | 28 Jul 2021 10:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38511 |
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