Colloidal electrostatic interactions near a conducting surface
Grier, David G.
|Source||Physical review. E , v.76, 2007, article number 041406|
|Summary||Like-charged colloidal spheres dispersed in de-ionized water are supposed to repel each other. Instead, artifact-corrected video microscopy measurements reveal an anomalous long-ranged like-charge attraction in the interparticle pair potential when the spheres are confined to a layer by even a single-charged glass surface. These attractions can be masked by electrostatic repulsions at low ionic strengths. Coating the bounding surfaces with a conducting gold layer suppresses the attraction. These observations suggest a possible mechanism for the anomalous confinement-induced attractions.|
|Rights||Physical Review E © copyright (2007) American Physical Society. The Journal's web site is located at http://pre.aps.org/'|
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