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Transverse polarizability of an aligned assembly of charged rods

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Abstract

The low-field transverse polarizability of the counterions condensed on an isolated charged rod is small. We show that it can be much larger if the rod is a member of an assembly of aligned rods. The polarization free energy of the assembly of rods in a transverse field is then similar to its polarization free energy in a field parallel to the rods. The polarization free energy of the assembly in a transverse field becomes lower than in a parallel field if the extent of the assembly (as measured, for example, by the diameter of a cylindrical assembly) is larger than the length of the individual rods. We suggest that this model may provide a reasonable explanation for the occurrence of “anomalous” birefringence in systems of interacting charged rodlike particles.

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  1. Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, 08854-8087, Piscataway, NJ, USA

    G. S. Manning

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  1. G. S. Manning
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Correspondence to G. S. Manning.

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Manning, G.S. Transverse polarizability of an aligned assembly of charged rods. Eur. Phys. J. E 30, 411 (2009). https://doi.org/10.1140/epje/i2009-10540-5

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  • DOI: https://doi.org/10.1140/epje/i2009-10540-5

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