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Decreased Osmotic Pressure via Interfacial Charge Clustering
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Physical Chemistry.
2010 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 114, no 31, 10049-10056 p.Article in journal (Refereed) Published
Abstract [en]

Behaviors of a model interfacial system featuring the clustering of discrete, mobile wall charges and a counterion solution are investigated. The results demonstrate that even very small localized charge clusters produce significant effects for the osmotic pressure, effects that are not adequately represented in common colloidal models. We observe a pronounced decrease in osmotic pressure where a certain level of clustering is attained, with potentially significant implications for theories of colloidal stability and biochemical processes at microscopic length scales. The stable level of wall charge clustering, and thus the osmotic pressure, is found to be variable in the addition of an attractive potential, as measured via the excess free energy of clustering.

Place, publisher, year, edition, pages
2010. Vol. 114, no 31, 10049-10056 p.
National Category
Physical Chemistry
Research subject
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-122560DOI: 10.1021/jp1007973ISI: 000280523700012PubMedID: 20684628OAI: oai:DiVA.org:uu-122560DiVA: diva2:310519
Available from: 2010-04-14 Created: 2010-04-14 Last updated: 2017-12-12Bibliographically approved

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Grime, John M AKhan, Malek O

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