Volume 60, Number 3, November I 2002
|Page(s)||349 - 355|
|Published online||01 October 2002|
Rectification and voltage gating of ion currents in a nanofabricated pore
Silesian University of Technology - Strzody 9,
44-100 Gliwice, Poland
2 Gesellschaft für Schwerionenforschung (GSI) Planckstr.1, D-64291 Darmstadt, Germany
3 Imperial College of Science, Technology and Medicine, Hammersmith Campus Du Cane Road, London W12 0NN, UK
4 Flerov Laboratory of Nuclear Reactions, JINR - 141980 Dubna, Russia
Corresponding author: Z.Siwy@gsi.de
Accepted: 19 August 2002
We have fabricated a voltage sensor in the form of a conically shaped nanopore in a polyethylene terephthalate (PET) foil. The pore is produced by irradiation of the foil with a single heavy ion and subsequent etching in alkaline solution. The resulting pore functions as a voltage gate and rectifies ion current due to changes of its diameter in an electrical field. Ion currents through the pore show voltage-dependent fluctuations, whose kinetics are similar as in voltage-gated biological ion channels and pores.
PACS: 05.60.-k – Transport processes / 81.16.-c – Methods of nanofabrication and processing / 81.07.De – Nanotubes
© EDP Sciences, 2002
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