DOI: 10.1063/1.474408. Attraction of electrostatic origin between colloids

Attraction of electrostatic origin between colloids

10.1063/1.474408

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The interaction between two spherical colloids immersed in an electrolyte of screening constant κ is studied using the recent charge regulation primitive model and the hypernetted chain integral equation. The charge of the particles is not fixed a priori but results from the adsorption of positive and/or negative ions onto the colloidal surfaces. In the case of symmetrical adsorption, the model exhibits a long-range attraction between the globally neutral colloids. At large distance, the effective colloid–colloid potential behaves as −exp(−2κr)/r2 for small colloids where r is the center to center interparticles distance and as −exp(−2κh)/h for large colloids where h is the surface to surface distance. For nonsymmetrical cases, such an attraction adds to the usual screened Coulombic repulsion between the globally charged colloids. The numerical results and the physical origin of the attraction are explained in terms of elementary diagrams. The attraction arises from the ion exchange between the adsorbed layers and the bulk and from the non mean-field ion–ion correlations.

Bibliography

Belloni, L., & Spalla, O. (1997). Attraction of electrostatic origin between colloids. The Journal of Chemical Physics, 107(2), 465â480.

Authors 2

Luc Belloni (first)
Olivier Spalla (additional)

References 44 Referenced 48

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:34 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 3:39 p.m.)
Indexed	1 year, 3 months ago (May 9, 2024, 9:17 a.m.)
Issued	28 years, 1 month ago (July 8, 1997)
Published	28 years, 1 month ago (July 8, 1997)
Published Print	28 years, 1 month ago (July 8, 1997)

Funders 0

None

BibTeX

@article{Belloni_1997, title={Attraction of electrostatic origin between colloids}, volume={107}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.474408}, DOI={10.1063/1.474408}, number={2}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Belloni, Luc and Spalla, Olivier}, year={1997}, month=jul, pages={465–480} }

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