Effective shape and phase behavior of short charged rods

We explicitly calculate the orientation-dependent second virial coefficient of short charged rods in an electrolytic solvent, assuming the rod-rod interactions to be a pairwise sum of hard-core and segmental screened-Coulomb repulsions. From the parallel and isotropically averaged second virial coef...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2009-04, Vol.79 (4 Pt 1), p.041401-041401, Article 041401
Hauptverfasser: Eggen, Eelco, Dijkstra, Marjolein, van Roij, René
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container_issue 4 Pt 1
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Eggen, Eelco
Dijkstra, Marjolein
van Roij, René
description We explicitly calculate the orientation-dependent second virial coefficient of short charged rods in an electrolytic solvent, assuming the rod-rod interactions to be a pairwise sum of hard-core and segmental screened-Coulomb repulsions. From the parallel and isotropically averaged second virial coefficient, we calculate the effective length and diameter of the rods, for charges and screening lengths that vary over several orders of magnitude. Using these effective dimensions, we determine the phase diagram, where we distinguish a low-charge and strong-screening regime with a liquid crystalline nematic and smectic phase, and a high-charge and weak-screening regime with a plastic crystal phase in the phase diagram.
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title Effective shape and phase behavior of short charged rods
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