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Mechanism of Chain Collapse of Strongly Charged Polyelectrolytes

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posted on 2018-02-06, 11:56 authored by Anvy Moly Tom, Satyavani Vemparala, R. Rajesh, Nikolai V. Brilliantov
We perform extensive molecular dynamics simulations of a charged polymer in a good solvent in the regime where the chain is collapsed. We analyze the dependence of the gyration radius Rg on the reduced Bjerrum length lB and find two different regimes. In the first one, called a weak electrostatic regime, Rg ∼ l−1=2 B , which is consistent only with the predictions of the counterion-fluctuation theory. In the second one, called a strong electrostatic regime, we find Rg ∼ l−1=5 B . To explain the novel regime we modify the counterion-fluctuation theory.

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Citation

Physical Review Letters, 2016, 117, 147801

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Mathematics

Version

  • VoR (Version of Record)

Published in

Physical Review Letters

Publisher

American Physical Society

issn

0031-9007

eissn

1079-7114

Acceptance date

2016-09-26

Copyright date

2016

Available date

2018-02-06

Publisher version

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.117.147801

Language

en

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