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Paper   IPM / P / 13100
School of Physics
  Title:   Perspective: Coulomb fluids-Weak coupling, strong coupling, in between and beyond
  Author(s): 
1.  A. Naji
2.  M. Kanduc
3.  J. Forsman
4.  R. Podgornik
  Status:   Published
  Journal: J. Chem. Phys.
  Vol.:  139
  Year:  2013
  Pages:   150901
  Supported by:  IPM
  Abstract:
We present a personal view on the current state of statistical mechanics of Coulomb fluids with special emphasis on the interactions between macromolecular surfaces, concentrating on the weak and the strong coupling limits. Both are introduced for a (primitive) counterion-only system in the presence of macroscopic, uniformly charged boundaries, where they can be derived systematically. Later we show how this formalism can be generalized to the cases with additional characteristic length scales that introduce new coupling parameters into the problem. These cases most notably include asymmetric ionic mixtures with mono- and multivalent ions that couple differently to charged surfaces, ions with internal charge (multipolar) structure and finite static polarizability, where weak and strong coupling limits can be constructed by analogy with the counterion-only case and lead to important new insights into their properties that can not be derived by any other means.


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