Attraction between like-charged walls: Short-ranged simulations using local molecular field theory

Effective attraction between like-charged walls mediated by counterions is studied using local molecular field (LMF) theory. Monte Carlo simulations of the "mimic system" given by LMF theory, with short-ranged "Coulomb core" interactions in an effective single particle potential...

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Bibliographic Details
Published in:Physical review letters 2006-09, Vol.97 (9), p.097801-097801, Article 097801
Main Authors: Rodgers, Jocelyn M, Kaur, Charanbir, Chen, Yng-Gwei, Weeks, John D
Format: Article
Language:English
Subjects:
Chemical Phenomena
Chemistry, Physical
Computer Simulation
DNA - chemistry
Electrochemistry
Monte Carlo Method
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Summary:Effective attraction between like-charged walls mediated by counterions is studied using local molecular field (LMF) theory. Monte Carlo simulations of the "mimic system" given by LMF theory, with short-ranged "Coulomb core" interactions in an effective single particle potential incorporating a mean-field average of the long-ranged Coulomb interactions, provide a direct test of the theory, and are in excellent agreement with more complex simulations of the full Coulomb system by Moreira and Netz [Eur. Phys. J. E 8, 33 (2002)]. A simple, generally applicable criterion to determine the consistency parameter sigma(min) needed for accurate use of the LMF theory is presented.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.97.097801