PMID: 15244568Jul 13, 2004Paper

Effect of three-body interactions on the phase behavior of charge-stabilized colloidal suspensions

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
A-P HynninenRené van Roij

Abstract

We study numerically the effect of attractive triplet interactions on the phase behavior of suspensions of highly charged colloidal particles at low salinity. In our computer simulations, we employ the pair and triplet potentials that were obtained from a numerical Poisson-Boltzmann study [Phys. Rev. E 66, 011402 (2002)]]. On the basis of free energy calculations, we determine the phase diagram of an aqueous suspension of identical spheres of diameter sigma=32 nm and charge Z=80 as a function of colloid concentration and salinity, both for the purely pairwise additive system and for the system with pair and triplet interactions. The main effect of including the triplet interactions is a destabilization of the body-centered-cubic (bcc) crystal phase in favor of the face-centered-cubic (fcc) crystal phase. As a consequence the phase diagram features the coexistence of a rather dilute fluid with an almost-close-packed fcc phase at low salinity and bcc-fcc coexistence with a big density jump at intermediate salinity. The triplet attractions do not affect the phase behavior at sufficiently high salinity; under these conditions the system is well described by the pairwise potential.

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Citations

Apr 15, 2010·The Journal of Chemical Physics·Patrick WetteStephan V Roth
Jul 11, 2006·The Journal of Chemical Physics·C Patrick RoyallAlfons van Blaaderen
Apr 15, 2010·The Journal of Chemical Physics·Alessio ZacconeMassimo Morbidelli
Jan 7, 2006·The Journal of Chemical Physics·Antti-Pekka Hynninen, Marjolein Dijkstra
Sep 4, 2009·The Journal of Chemical Physics·Vincent Dahirel, Jean Pierre Hansen
Feb 16, 2011·Nanoscale·David A WalkerBartosz A Grzybowski
Apr 12, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Bas Zoetekouw, René van Roij
May 23, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·A R Denton
Sep 23, 2019·The Journal of Chemical Physics·Egor V YakovlevStanislav O Yurchenko
Jun 4, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Aldemar TorresRené van Roij
Aug 7, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Martin HechtHans J Herrmann
Jan 15, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Chuan DuDarong Chen

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