P-n semiconductor membrane for electrically tunable ion current rectification and filtering

Maria E. Gracheva, Julien Vidal, Jean Pierre Leburton

Research output: Contribution to journalArticlepeer-review

Abstract

We show that a semiconductor membrane made of two thin layers of opposite (n- and p-) doping can perform electrically tunable ion current rectification and filtering in a nanopore. Our model is based on the solution of the 3D Poisson equation for the electrostatic potential in a double-cone nanopore combined with a transport model. It predicts that, for appropriate biasing of the membrane-electrolyte system, transitions from ohmic behavior to sharp rectification with vanishing leakage current are achievable. Furthermore, ion current rectifying and filtering regimes of the nanopore correspond to different charge states in the p-n membrane, which can be tuned with appropriate biasing of the nand p- layers.

Original languageEnglish (US)
Pages (from-to)1717-1722
Number of pages6
JournalNano letters
Volume7
Issue number6
DOIs
StatePublished - Jun 2007

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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