Phase-separation in ion-containing mixtures in electric fields

Yoav Tsori, Ludwik Leibler

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

When a liquid mixture is subjected to external electric fields, ionic screening leads to field gradients. We point out that, if the mixture is initially in the homogeneous phase, this screening can bring about a robust phase-separation transition with two main features: (i) the phase separation is expected to occur in any electrode geometry, and (ii) the voltage required is typically of the order of 1 V and even less. We discuss several applications of the effect relevant to the field of microfluidics, focusing on the creation of a nanometer-scale lubrication layer in the phase separation process and the modification of the slip length.

Original languageEnglish
Pages (from-to)7348-7350
Number of pages3
JournalProceedings of the National Academy of Sciences of the United States of America
Volume104
Issue number18
DOIs
StatePublished - 1 May 2007

ASJC Scopus subject areas

  • General

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