COLL 155 |
| Oksana Kolesnikova, Anatoli Trusov, Alexei Voitylov, Vladislav Vojtylov, and Tatiana Zernova. Department of Physics, St. Petersburg State University, Ulianovskaja 1, Sankt-Petersburg, 198504, Russia |
| While studying the electric properties of colloid particles we developed new methods and equipment which allowed us to study electrophoretic and electrooptic properties of the system simultaneously. We made the following conclusions: 1. Change of the electrooptic effect due to electrophoresis allows to determine the correlation between charge, polarizability and size of the particles, and also check the Helmholtz-Smoluchowski equation for colloid systems. 2. Drop of volume of colloid systems does not influence some electro-optic dependencies. This changes the experimental conditions from adiabatic to isothermal and allows us to study nonlinear electrooptic effects (that requires strong electric field) in systems of high electric conductivity. Existing theory of electrokinetic phenomena corresponds to the results of electrophoretic experiments on such systems. 3. Determination of particle distribution functions on their parameters from the electrooptic experiment allows us to study the electrooptic and electrokinetic properties of colloid particles in more details. |
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Colloidal and Molecular Electro-Optics
Division of Colloid and Surface Chemistry |