COLL 159 |
| Stoyl P. Stoylov and Maria Buleva. Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad. G. Bontchev str., bl. 11, 1113 Sofia, Bulgaria |
| The deformation of a gas-liquid interface in an inhomogeneous alternating electric field (sharp electrode 30 micrometers above the interface) is studied by micro-interferometry. A quadratic dependence of the magnitude of deformation on the electric field strength in the range 0 to 4 x 106 V/m was found at all frequencies investigated. The magnitude of the deformation at high electric field strengths showed a dispersion in the range 160 kHz-2 MHz. This dependence together with the observed weak dependence of the magnitude of deformation on the ionic strength, pH and the addition of ionogenic surface active substances was interpreted as a manifestation of the predominant role of Maxwell-Wagner polarization. The relation of these results to the electro-optically determined interfacial polarization, and the colloid forces connected with it, is discussed. |
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Colloidal and Molecular Electro-Optics
Division of Colloid and Surface Chemistry |