Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/2968

Colloidal electrostatic interactions near a conducting surface

Authors Han, Yilong
Polin, Marco
Grier, David G.
Issue Date 2007-10-30
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.
Subjects
Rights Physical Review E © copyright (2007) American Physical Society. The Journal's web site is located at http://pre.aps.org/'
Language English
Format Article
Access Find@HKUST
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