Abstract
The advantage of characterization of submicron particles is that the measurement of the specific surface conductivity (SSC) and therefore the determination of the mobile charge and Stem potential in addition to the electrokinetic charge and potential is possible, which is not feasible with large particles. The ion adsorption and the stability ratio depend on Stem potential exponentially. A substitution of zeta potential for it in the above mentioned exponents can result in a large error. Consequently Stem potential measurement (instead of using zeta potential) is a necessary condition to quantify the theory of ion-particle and particle-particle interactions. Low-frequency dielectric dispersion provides the best opportunity for its determination due to high sensitivity to SSC. Recent development in quantifying the particle-particle interaction based on three variants of nonstandard electrokinetic model is characterized. The combined measurements of mobile and electrokinetic charges enable us to discriminate between the models and to choose the variant of theory of particle-particle interaction. SSC and zeta potential investigation in a wide range of electrolyte concentration and pH enable us to specify the values of invariant parameters of the models.
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© 1996 Kluwer Academic Publishers
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Dukhin, S.S. (1996). Electrochemical Characterization of Submicron Particle Surface Including Surface Chemistry and Structure. In: Pelizzetti, E. (eds) Fine Particles Science and Technology. NATO ASI Series, vol 12. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0259-6_4
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DOI: https://doi.org/10.1007/978-94-009-0259-6_4
Publisher Name: Springer, Dordrecht
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