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Screening in Yukawa fluid mixtures

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journal contribution
posted on 08.10.2014, 14:50 by Andrew ArcherAndrew Archer, Paul Hopkins, Robert Evans
The effective pair potential between mesoscopic charged particles in a neutralizing background medium takes a Yukawa form exp (-λr)/r with screening length λ-1. We consider a dilute suspension of such Yukawa particles dispersed in a solvent with correlation length ξ< λ-1 and show that the Yukawa interaction is screened if the pair potentials between solvent particles exhibit Yukawa decay with the same screening length λ-1. However, if the solvent pair potentials are shorter ranged than the solute Yukawa potentials, then the effective potential between pairs of solute particles is unscreened, i.e., the effective potential between the solute particles is equal to the bare potential at large particle separations. © 2006 The American Physical Society.

Funding

A.J.A. acknowledges the support of EPSRC under Grant No. GR/S28631/01.

History

School

  • Science

Department

  • Mathematical Sciences

Published in

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics

Volume

74

Issue

1

Citation

ARCHER, A.J., HOPKINS, P. and EVANS, R., 2006. Screening in Yukawa fluid mixtures. Physical Review E, 74 (1),010402.

Publisher

© The American Physical Society

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2006

Notes

This article was published in the journal, Physical Review E [© The American Physical Society].

ISSN

1539-3755

eISSN

1550-2376

Language

en

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