Nanofluidic diode generated by pH gradient inside track-etched conical nanopore

L. Wang, W. Guo, Y. B. Xie, X. W. Wang, J. M. Xue, Y. G. Wang

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

A nanofluidic diode is produced with a track-etched single conical nanopore embedded in a polyethylene terephthalate (PET) film. It has a very strong current rectification behavior which depends on the surface charge densities and the solution salt concentration. We tried to control the current rectification properties by using asymmetric pH solutions on the two side of nanopore membrane, because this arrangement could adjust the surface charge density distribution inside the nanopore since it depends on the local pH value. This nanofluidic diode is analogous to a bipolar semiconductor diode which is sensitive to the solution pH values.

Original languageEnglish
Pages (from-to)1119-1122
Number of pages4
JournalRadiation Measurements
Volume44
Issue number9-10
DOIs
StatePublished - Oct 2009
Externally publishedYes

Keywords

  • Asymmetric pH gradient
  • Distribution of surface charge
  • Rectification effect

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