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Colloidal electrostatic interactions near a conducting surface
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Polin, Marco, Grier, David and Han, Yilong (2007) Colloidal electrostatic interactions near a conducting surface. Physical Review E, Volume 76 (Number 4). Article number 041406 . doi:10.1103/PhysRevE.76.041406 ISSN 1539-3755.
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Official URL: http://dx.doi.org/10.1103/PhysRevE.76.041406
Abstract
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.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
Journal or Publication Title: | Physical Review E | ||||||
Publisher: | American Physical Society | ||||||
ISSN: | 1539-3755 | ||||||
Official Date: | 30 October 2007 | ||||||
Dates: |
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Volume: | Volume 76 | ||||||
Number: | Number 4 | ||||||
Article Number: | Article number 041406 | ||||||
DOI: | 10.1103/PhysRevE.76.041406 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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