Anomalous interactions in confined charge-stabilized colloid

D G Grier, Y Han
2004 Journal of Physics: Condensed Matter  
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
more » ... e 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.
doi:10.1088/0953-8984/16/38/028 fatcat:u3znvhj22ffs7ironloelcicqm