Interaction between like-charged colloidal particles in aqueous electrolyte solution: Attractive component arising from solvent granularity
The potential of mean force (PMF) between like-charged colloidal particles immersed in aqueous electrolyte solution is studied using the integral equation theory. Solvent molecules are modeled as neutral hard spheres, and ions and colloidal particles are taken to be charged hard spheres. The Coulo...
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| Datum: | 2007 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Інститут фізики конденсованих систем НАН України
2007
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| Schriftenreihe: | Condensed Matter Physics |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/118944 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Interaction between like-charged colloidal particles in aqueous electrolyte solution: Attractive component arising from solvent granularity / R. Akiyama, N. Fujino, K. Kaneda, M. Kinoshita // Condensed Matter Physics. — 2007. — Т. 10, № 4(52). — С. 587-596. — Бібліогр.: 31 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | The potential of mean force (PMF) between like-charged colloidal particles immersed in aqueous electrolyte
solution is studied using the integral equation theory. Solvent molecules are modeled as neutral hard spheres,
and ions and colloidal particles are taken to be charged hard spheres. The Coulomb potentials for ion-ion, ioncolloidal
particle, and colloidal particle-colloidal particle pairs are divided by the dielectric constant of water.
This simple model is employed to account for the effects of solvent granularity neglected in the so-called
primitive model. The van der Waals attraction between colloidal particles, which is an essential constituent of
conventional DLVO theory, is omitted in the present model. Nevertheless, when the electrolyte concentration
is sufficiently high, attractive regions appear in the PMF. In particular, the interaction at small separations is
significantly attractive and the contact of colloidal particles is stabilized. This interesting behavior arises from
the effects of the translational motion of solvent molecules. |
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