By Norio Ise, Ikuo Sogami
This e-book is designed to significantly evaluate experimental findings on ionic polymers and colloidal debris and to turn out a theoretical framework in line with the Poisson-Boltzmann technique. constitution formation in ionic polymer options has attracted realization because the days of H. Staudinger and J. D. Bernal. An self sustaining learn on ionic colloidal dispersions with microscopy supplied a compelling facts of constitution formation. contemporary technical advancements have made it attainable to acquire appropriate info for either ionic polymers and colloidal debris in dilute platforms. the phenomenal phenomenon experimentally came upon is microscopic inhomogeneity within the solute distribution in macroscopically homogeneous systems.To account for the remark, the current authors have invoked the lifestyles of the counterion-mediated charm among equally charged solute species, as well as the generally approved electrostatic repulsion.
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Additional info for Structure Formation in Solution : Ionic Polymers and Colloidal Particles
Sample text
In addition to the repulsive force originating from electric interactions, an attractive force is indispensable to describe instability of macroionic dispersion. The DLVO theory naturally identifies the van der Waals force as such an attraction. In this section, we solve the PB equation for the systems with one and two charged plates and obtain a repulsive potential of screened Coulomb type. The results are generalized and applied to systems of spherical particles with large radius. Explaining the origin of the van der Waals attraction using an oscillator model, an attractive potential between two spherical molecules is derived.
AddisonWesley Publishing Company, New York 21. Bern BJ, Pecora R (1976) Dynamic light scattering. Wiley, New York 22. Schmitz KS (1990) An Introduction to dynamic light scatterting by macromolecules. Academic Press, New York 23. Chu B (1991) Laser light scattering: Basic principles and practice. Academic Press, Boston 30 References 24. Johnson CS, Gabriel DA (1994) Laser light scattering. Dover Publications, New York 25. Kittel C (1976) Introduction to solid state physics. John Wiley & Sons, New York 26.
In colloid chemistry, the expression “repulsion induced by overlapping of electric double layers” is often used. This is an ingenious phrase to express a characteristic of macroionic interactions. This phrase, however, tacitly ignores an important physical implication of the actual situation that the counterions around the midpoint between the plates are shared by two plates. In fact, as shown in Chap. 6, a cloud of counterions shared by two plates (or two spherical particles) has the effect of inducing a weak long-range attraction between them.
