Interplay between adsorption and hydrodynamics in nanochannels: towards tunable membranes

Sela Samin, René van Roij

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We study how adsorption of a near-critical binary mixture in a nanopore is modified by flow inside the pore. We identify three types of steady states upon variation of the pore P\'{e}clet number (${\rm Pe}_p$), which can be reversibly accessed by the application of an external pressure. Interestingly, for small ${\rm Pe}_p$ the pore acts as a weakly selective membrane which separates the mixture. For intermediate ${\rm Pe}_p$, the flow effectively shifts the adsorption in the pore thereby opening possibilities for enhanced and tunable solute transport through the pore. For large ${\rm Pe}_p$, the adsorption is progressively reduced inside the pore, accompanied by a long ranged dispersion of the mixture far from the pore.
Original languageEnglish
Article number014502
Pages (from-to)1-5
JournalPhysical Review Letters
Volume118
Issue number1
DOIs
Publication statusPublished - 6 Jan 2017

Keywords

  • cond-mat.soft
  • physics.flu-dyn

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