Anomalous interactions in confined charge-stabilized colloid

D. G. Grier; Y. Han

doi:10.1088/0953-8984/16/38/028

Anomalous interactions in confined charge-stabilized colloid

D. G. Grier, Y. Han

Research output: Contribution to journal › Article › peer-review

Abstract

Charge-stabilized colloidal spheres dispersed in weak 1:1 electrolytes are supposed to repel each other. Consequently, experimental evidence for anomalous long-ranged like-charged attractions induced by geometric confinement inspired a burst of activity. This has largely subsided because of nagging doubts regarding the experiments' reliability and interpretation. We describe a new class of thermodynamically self-consistent colloidal interaction measurements that confirm the appearance of pairwise attractions among colloidal spheres confined by one or two bounding walls. In addition to supporting previous claims for this as-yet unexplained effect, these measurements also cast new light on its mechanism.

Original language	English (US)
Pages (from-to)	S4145-S4157
Journal	Journal of Physics Condensed Matter
Volume	16
Issue number	38
DOIs	https://doi.org/10.1088/0953-8984/16/38/028
State	Published - Sep 29 2004

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1088/0953-8984/16/38/028

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AB - Charge-stabilized colloidal spheres dispersed in weak 1:1 electrolytes are supposed to repel each other. Consequently, experimental evidence for anomalous long-ranged like-charged attractions induced by geometric confinement inspired a burst of activity. This has largely subsided because of nagging doubts regarding the experiments' reliability and interpretation. We describe a new class of thermodynamically self-consistent colloidal interaction measurements that confirm the appearance of pairwise attractions among colloidal spheres confined by one or two bounding walls. In addition to supporting previous claims for this as-yet unexplained effect, these measurements also cast new light on its mechanism.

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Anomalous interactions in confined charge-stabilized colloid

Abstract

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