Counterion correlations and attraction between like-charged macromolecules.

  title={Counterion correlations and attraction between like-charged macromolecules.},
  author={Alexandre Diehl and Humberto A. Carmona and Yan Levin},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={64 1 Pt 1},
A simple model is presented for the appearance of attraction between two like-charged polyions inside a polyelectrolyte solution. The polyions are modeled as rigid cylinders in a continuum dielectric solvent. The strong electrostatic interaction between the polyions and the counterions results in counterion condensation. If the two polyions are sufficiently close to each other their layers of condensed counterions can become correlated resulting in attraction between the macromolecules. To… Expand
Solvation effects on like-charge attraction.
By calculating counterion-rodion pair correlation functions, it is found that the presence of water molecules changes the structure of the counterion cloud and results in both qualitative and quantitative changes of the force between highly charged polyelectrolytes. Expand
Attractive forces between circular polyions of the same charge
We study two models of ring-like polyions which are two-dimensional versions of simple models for colloidal particles (model A) and for rod-like segments of DNA (model B), both in solution withExpand
Aggregation of rod-like polyelectrolyte chains in the presence of monovalent counterions.
It is demonstrated that monovalent counterions can induce aggregation of similarly charged rod-like polyelectrolyte chains and the angular distribution of the condensed counterions is no longer isotropic in the attractive regime. Expand
Thermodynamic Properties of a Simple Model of Like-Charged Attracting Rods
We study the thermodynamic properties of a simple model for the possible mechanism of attraction between like charged rod-like polyions inside a polyelectrolyte solution. We consider two polyions inExpand
Persistence length of a strongly charged rodlike polyelectrolyte in the presence of salt.
  • G. Ariel, D. Andelman
  • Physics, Medicine
  • Physical review. E, Statistical, nonlinear, and soft matter physics
  • 2003
The persistence length of a single, intrinsically rigid polyelectrolyte chain, above the Manning condensation threshold is investigated theoretically in the presence of added salt, and it is found that density correlations between counterions and thermal fluctuations reduce the stiffness of the chain, indicating an effective attraction between monomers for highly charged chains and multivalent counterions. Expand
Clusters in strong polyelectrolyte solutions in the condensation theory approach.
The interaction free energy of parallel clusters of like-charged rod polyelectrolytes in solution is calculated in the framework of the extended condensation theory and is a counterintuitive organization due to the increasing of the counterion condensed charge and condensation volume. Expand
Electrostatics of strongly charged biological polymers: ion-mediated interactions and self-organization in nucleic acids and proteins.
Widespread work in theory, experiment, and computation has been carried out to gain a fundamental understanding of the rich, yet sometimes counterintuitive, behavior of these polyelectrolyte systems. Expand
Counterion-mediated weak and strong coupling electrostatic interaction between like-charged cylindrical dielectrics.
The effects of image charges induced as a result of the dielectric mismatch between the cylindrical cores and the surroundingDielectric medium are focused on and the counterion-mediated electrostatic interaction between the cylinders in both limits of weak and strong electrostatic couplings is investigated. Expand
Aggregation dynamics of rigid polyelectrolytes.
The results suggest that once counterions condense, effective interactions between polyelectrolyte chains short-ranged and the aggregation of polyelectROlytes are diffusion-limited. Expand
Electrostatic interactions in strongly coupled soft matter
Abstract Charged soft-matter systems—such as colloidal dispersions and charged polymers—are dominated by attractive forces between constituent like-charged particles when neutralizing counterions ofExpand


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Physical Questions Posed by DNA Condensation
Two physical problems are explored: the origin of the attractive interactions between the highly-negatively charged DNA chains that cause them to concentrate into bundles, and the mechanism that provents the bundles from growing indefinitely large. Expand