Phase-separation transition in liquid mixtures near curved charged objects

The Journal of Chemical Physics
Gilad MarcusYoav Tsori

Abstract

We study the thermodynamic behavior of nonpolar liquid mixtures in the vicinity of curved charged objects, such as electrodes or charged colloids. There is a critical value of charge (or potential), above which a phase-separation transition occurs, and the interface between high- and low-dielectric constant components becomes sharp. Analytical and numerical composition profiles are given, and the equilibrium front location as a function of charge or voltage is found. We further employ a simple Cahn-Hilliard type equation to study the dynamics of phase separation in spatially nonuniform electric fields. We find an exponential temporal relaxation of the demixing front location. We give the dependence of the steady-state location and characteristic time on the charge, mixture composition and ambient temperature.

References

Jul 30, 2004·Nature·Yoav TsoriLudwik Leibler
Aug 5, 2004·The Journal of Chemical Physics·Akira Onuki, Hikaru Kitamura
Dec 17, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tatsuhiro ImaedaAkira Onuki
Apr 20, 2007·Proceedings of the National Academy of Sciences of the United States of America·Yoav Tsori, Ludwik Leibler
Jan 11, 2008·Nature·C HertleinC Bechinger

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Citations

Nov 26, 2009·The Journal of Chemical Physics·Sela Samin, Yoav Tsori
Apr 5, 2014·The Journal of Chemical Physics·Jennifer Galanis, Yoav Tsori
Dec 8, 2014·The Journal of Chemical Physics·Jennifer Galanis, Yoav Tsori
Oct 21, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Takeaki Araki, Akira Onuki
Feb 18, 2010·Faraday Discussions·Benjamin RotenbergDaan Frenkel
Jun 29, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Akira OnukiRyuichi Okamoto
Jun 19, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Sela SaminChristian Holm
Aug 16, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jennifer Galanis, Yoav Tsori
Jan 15, 2011·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ryuichi Okamoto, Akira Onuki
Apr 7, 2010·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·A GambassiS Dietrich
Mar 5, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hirofumi ToyamaHiroyuki Kitahata
Dec 15, 2010·The Journal of Physical Chemistry. B·Sela Samin, Yoav Tsori

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