This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1021/jp910960r in citations.
Collapse of Highly Charged Polyelectrolytes Triggered by Attractive Dipole-Dipole and Correlation-Induced Electrostatic Interactions
Collapse of Highly Charged Polyelectrolytes Triggered by Attractive Dipole-Dipole and Correlation-Induced Electrostatic Interactions
In the first part of the paper, we study the collapse of flexible highly charged polyelectrolyte chains induced by attractive dipole-dipole interactions. The latter emerge due to the formation of dipoles between the chain monomers and counterions condensed on the polyelectrolyte from solution. Using...
Saved in:
Personal Name(s): | Cherstvy, A. |
---|---|
Contributing Institute: |
Theorie der Weichen Materie und Biophysik; IFF-2 |
Published in: |
The @journal of physical chemistry |
Imprint: |
Washington, DC
Soc.
2010
|
Physical Description: |
5241 - 5249 |
DOI: |
10.1021/jp910960r |
PubMed ID: |
20359231 |
Document Type: |
Journal Article |
Research Program: |
BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung |
Series Title: |
Journal of Physical Chemistry B
114 |
Subject (ZB): | |
Publikationsportal JuSER |
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520 | |a In the first part of the paper, we study the collapse of flexible highly charged polyelectrolyte chains induced by attractive dipole-dipole interactions. The latter emerge due to the formation of dipoles between the chain monomers and counterions condensed on the polyelectrolyte from solution. Using the statistics of slightly perturbed Gaussian polymers, we obtain the scaling relations for the chain dimensions as a function of polyelectrolyte linear charge density in the limit of compacting chains. The results are in good agreement with the outcomes of recent molecular dynamics simulations of the collapse of flexible polyelectrolytes in the presence of explicit counterions. In the second part, we analyze the results of molecular dynamics simulations for the complex formation by two highly charged polyelectrolyte chains carrying opposite charges. We use the scaling arguments based on the picture of complexation of electrostatic blobs in order to rationalize the size of the complexes of two polyelectrolyte chains in the collapsed state. Similar scaling relation for the complex size was recently obtained in computer simulations of complexation of diblock polyampholytes and was described theoretically on the basis of similar electrostatic blob concepts. We also analyze the density of complexes formed and polyelectrolyte linear charge densities required for the onset onto the collapse as a function of interaction strength between the monomers. In both parts of the paper, we overview the scaling relationships obtained for similar systems with alternating charges from other theoretical approaches. | ||
650 | 2 | |2 MeSH |a Computer Simulation | |
650 | 2 | |2 MeSH |a Electrolytes: chemistry | |
650 | 2 | |2 MeSH |a Models, Molecular | |
650 | 2 | |2 MeSH |a Molecular Conformation | |
650 | 2 | |2 MeSH |a Polymers: chemistry | |
650 | 2 | |2 MeSH |a Static Electricity | |
650 | 7 | |0 0 |2 NLM Chemicals |a Electrolytes | |
650 | 7 | |0 0 |2 NLM Chemicals |a Polymers | |
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915 | |0 StatID:(DE-HGF)0010 |a JCR/ISI refereed | ||
914 | 1 | |y 2010 | |
500 | |a I acknowledge many helpful discussions with R. G. Winkler, valuable comments of M. Castelnovo, Y. Kantor, M. Kardar, and H. Schiessel, insightful comments of the reviewers, as well as the financial support by the DFG through the Grant CH 707/2-2. | ||
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245 | |a Collapse of Highly Charged Polyelectrolytes Triggered by Attractive Dipole-Dipole and Correlation-Induced Electrostatic Interactions | ||
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