Distribution of counterions near discretely charged planes and rods

M. L. Henle; C. D. Santangelo; D. M. Patel; P. A. Pincus

doi:10.1209/epl/i2003-10205-1

Distribution of counterions near discretely charged planes and rods

M. L. Henle, C. D. Santangelo, D. M. Patel, P. A. Pincus

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

Realistic charged macromolecules are characterized by discrete (rather than homogeneous) charge distributions. We investigate the effects of surface charge discretization on the counterion distribution at the level of mean-field theory using a two-state model. Both planar and cylindrical geometries are considered; for the latter case, we compare our results to numerical solutions of the full Poisson-Boltzmann equation. We find that the discretization of the surface charge can cause enhanced localization of the counterions near the surface; for charged cylinders, counterion condensation can exceed Oosawa-Manning condensation.

Original language	English (US)
Pages (from-to)	284-290
Number of pages	7
Journal	EPL
Volume	66
Issue number	2
DOIs	https://doi.org/10.1209/epl/i2003-10205-1
State	Published - Apr 15 2004
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1209/epl/i2003-10205-1

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abstract = "Realistic charged macromolecules are characterized by discrete (rather than homogeneous) charge distributions. We investigate the effects of surface charge discretization on the counterion distribution at the level of mean-field theory using a two-state model. Both planar and cylindrical geometries are considered; for the latter case, we compare our results to numerical solutions of the full Poisson-Boltzmann equation. We find that the discretization of the surface charge can cause enhanced localization of the counterions near the surface; for charged cylinders, counterion condensation can exceed Oosawa-Manning condensation.",

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T1 - Distribution of counterions near discretely charged planes and rods

AU - Henle, M. L.

AU - Santangelo, C. D.

AU - Patel, D. M.

AU - Pincus, P. A.

PY - 2004/4/15

Y1 - 2004/4/15

N2 - Realistic charged macromolecules are characterized by discrete (rather than homogeneous) charge distributions. We investigate the effects of surface charge discretization on the counterion distribution at the level of mean-field theory using a two-state model. Both planar and cylindrical geometries are considered; for the latter case, we compare our results to numerical solutions of the full Poisson-Boltzmann equation. We find that the discretization of the surface charge can cause enhanced localization of the counterions near the surface; for charged cylinders, counterion condensation can exceed Oosawa-Manning condensation.

AB - Realistic charged macromolecules are characterized by discrete (rather than homogeneous) charge distributions. We investigate the effects of surface charge discretization on the counterion distribution at the level of mean-field theory using a two-state model. Both planar and cylindrical geometries are considered; for the latter case, we compare our results to numerical solutions of the full Poisson-Boltzmann equation. We find that the discretization of the surface charge can cause enhanced localization of the counterions near the surface; for charged cylinders, counterion condensation can exceed Oosawa-Manning condensation.

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JO - EPL

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Distribution of counterions near discretely charged planes and rods

Abstract

ASJC Scopus subject areas

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