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Orientationally ordered aggregates of stiff polyelectrolytes in the presence of multivalent salt

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Golestanian,  Ramin
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Mohammadinejad, S., Fazli, H., & Golestanian, R. (2009). Orientationally ordered aggregates of stiff polyelectrolytes in the presence of multivalent salt. Soft Matter, 5(7), 1522-1529. doi:10.1039/b815953j.


Cite as: http://hdl.handle.net/21.11116/0000-0001-7903-4
Abstract
Aggregation of stiff polyelectrolytes in solution and angle- and distance-dependent potential of mean force between two like-charged rods are studied in the presence of 3-valent salt using molecular dynamics simulations. In the bulk solution, formation of long-lived metastable structures with similarities to the raft-like structures of actin filaments is observed within a range of salt concentration. The system finally goes to a state with lower free energy in which finite-sized bundles of parallel polyelectrolytes form. Preferred angle and interaction type between two like-charged rods at different separations and salt concentrations are also studied, which shed some light on the formation of orientationally ordered structures. © The Royal Society of Chemistry 2009.