Interplay between Nanochannel and Microchannel Resistances

Yoav Green, Ran Eshel, Sinwook Park, Gilad Yossifon

Research output: Contribution to journalArticlepeer-review

Abstract

Current nanochannel system paradigm commonly neglects the role of the interfacing microchannels and assumes that the ohmic electrical response of a microchannel-nanochannel system is solely determined by the geometric properties of the nanochannel. In this work, we demonstrate that the overall response is determined by the interplay between the nanochannel resistance and various microchannel attributed resistances. Our experiments confirm a recent theoretical prediction that in contrast to what was previously assumed at very low concentrations the role of the interfacing microchannels on the overall resistance becomes increasingly important. We argue that the current nanochannel-dominated conductance paradigm can be replaced with a more correct and intuitive microchannel-nanochannel-resistance-model-based paradigm.

Original languageEnglish
Pages (from-to)2744-2748
Number of pages5
JournalNano Letters
Volume16
Issue number4
DOIs
StatePublished - 13 Apr 2016
Externally publishedYes

Keywords

  • Nanofluidics
  • concentration polarization
  • electrokinetics
  • fluid-based circuits

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