Electrically tunable solid-state silicon nanopore ion filter

Julien Vidal, Maria E. Gracheva, Jean Pierre Leburton

Research output: Contribution to journalArticlepeer-review

Abstract

We show that a nanopore in a silicon membrane connected to a voltage source can be used as an electrically tunable ion filter. By applying a voltage between the heavily doped semiconductor and the electrolyte, it is possible to invert the ion population inside the nanopore and vary the conductance for both cations and anions in order to achieve selective conduction of ions even in the presence of significant surface charges in the membrane. Our model based on the solution of the Poisson equation and linear transport theory indicates that in narrow nanopores substantial gain can be achieved by controlling electrically the width of the charge double layer.

Original languageEnglish (US)
Pages (from-to)61-68
Number of pages8
JournalNanoscale Research Letters
Volume2
Issue number2
DOIs
StatePublished - Feb 2007

Keywords

  • Artificial nanopore
  • Ion channels
  • Nanofluidics
  • Silicon materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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