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Chemical Charge Regulation and Charge Renormalization in Concentrated Colloidal Suspensions

✍ Scribed by H.H von Grünberg

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
81 KB
Volume
219
Category
Article
ISSN
0021-9797

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✦ Synopsis

This article discusses the charging behavior of particles in a colloidal suspension allowing for a simple model reaction at the surface of the colloidal particles that regulates the total number Z f of free counterions. This number is to be distinguished from an effective number of charges Z* calculated in the Wigner-Seitz cell model to determine the interaction between the colloidal particles. We discuss the problem in terms of the full free energy of the system. The number of free counterions Z f as a function of the structural charge of the colloid is derived from the minimum of this free energy. Our results are compared with experimental data.

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