Control of ionic transport through gated single conical nanopores

Eric B. Kalman, Olivier Sudre, Ivan Vlassiouk, Zuzanna S. Siwy

Research output: Contribution to journalArticlepeer-review

157 Scopus citations

Abstract

Control of ionic transport through nanoporous systems is a topic of scientific interest for the ability to create new devices that are applicable for ions and molecules in water solutions. We show the preparation of an ionic transistor based on single conical nanopores in polymer films with an insulated gold thin film "gate." By changing the electric potential applied to the "gate," the current through the device can be changed from the rectifying behavior of a typical conical nanopore to the almost linear behavior seen in cylindrical nanopores. The mechanism for this change in transport behavior is thought to be the enhancement of concentration polarization induced by the gate.

Original languageEnglish
Pages (from-to)413-419
Number of pages7
JournalAnalytical and Bioanalytical Chemistry
Volume394
Issue number2
DOIs
StatePublished - May 2009
Externally publishedYes

Funding

Acknowledgment This work was supported by the National Science Foundation (CHE 0747237). ZS is an Alfred P. Sloan Research Fellow. The single-ion irradiation was performed at the Gesellschaft fuer Schwerionenforschung, Darmstadt, Germany. We are grateful to Dr. Phan Vu for deposition of metal and silica layers.

Keywords

  • Electroanalytical methods
  • Microfluidics/microfabrication
  • Nanotechnology

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