2134/16024 Andrew Archer Andrew Archer Paul Hopkins Paul Hopkins Robert Evans Robert Evans Screening in Yukawa fluid mixtures Loughborough University 2014 untagged Mathematical Sciences not elsewhere classified 2014-10-08 14:50:34 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/Screening_in_Yukawa_fluid_mixtures/9388346 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.