Laser Doppler Electrophoresis For Colloid Characterization

R. Isherwood; B. R. Jennings

doi:10.1117/12.943676

27 March 1985 Laser Doppler Electrophoresis For Colloid Characterization

R. Isherwood, B. R. Jennings

Proceedings Volume 0492, 1984 European Conf on Optics, Optical Systems, and Applications; (1985) https://doi.org/10.1117/12.943676
Event: 1984 European Conference on Optics, Optical Systems and Applications, 1984, Amsterdam, Netherlands

Abstract

A light scattering photometer is described with which one can measure periodicity in the intensity fluctuations of light, scattered from a dilute colloidal suspension. Using a specially designed sample cell, variations in the scattering when the system is subjected to pulsed electric fields can be recorded and interpreted to give the electrophoretic mobility for colloidal particles. Under conditions of direct optical transmission, transient optical birefringent effects can be measured and interpreted in terms of the electrical polarisability of the particles. These two parameters are of value in characterising the surface charges and hence the stability of the particles in their fluid environment. Illustrative data are given for asbestos sols.

Citation Download Citation

R. Isherwood and B. R. Jennings "Laser Doppler Electrophoresis For Colloid Characterization", Proc. SPIE 0492, 1984 European Conf on Optics, Optical Systems, and Applications, (27 March 1985); https://doi.org/10.1117/12.943676

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