Phys. Rev. E 63, 021402 (2001) [14 pages]Effective attraction between like-charged colloids in a two-dimensional plasmaReceived 12 August 2000; published 19 January 2001 The existence of attractions between like-charged colloids immersed in ionic solution has been discovered in recent experiments. This phenomenon contradicts the predictions of Derjaguin-Landau-Verwey-Overbeek and indicates a failure of mean-field theory. We study a toy model based on a two-dimensional one-component plasma, which is exactly soluble at one particular coupling constant. We show that colloidal interaction results from a competition between ion-ion repulsion and longer ranged ion-void attraction. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.63.021402
DOI:
10.1103/PhysRevE.63.021402
PACS:
82.70.Dd
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