Volume 78, Number 2, April 2007
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||27 March 2007|
Tuning ion current rectification in asymmetric nanopores by signal mixing
Department of Physics and Astronomy, University of California, Irvine - Irvine, CA 92697, USA
2 Department of Electrical and Electronic Engineering, University College Cork - Cork, Ireland
Corresponding author: email@example.com
Accepted: 26 February 2007
Transport properties of asymmetric and rectifying single nanopores in polymer films were studied in the presence of a sum of two periodic, rectangular voltage signals, with the aim of testing signal mixing as a tool for tuning ion current rectification. Current-voltage curves and net ion currents were recorded when the two voltage signals were added with a controlled phase difference. We show that changing the ratio of frequencies, the phase difference and amplitude of the two voltage inputs gives a new possibility to enhance, hinder or cancel the rectifying properties of the nanoporous system. Our experimental results are explained by a model of a doubly rocked ratchet in the adiabatic regime, presented in Europhys. Lett., 67 (2004) 179.
PACS: 81.07.De – Nanotubes / 81.16.-c – Methods of nanofabrication and processing / 87.16.Uv – Active transport processes; ion channels
© Europhysics Letters Association, 2007
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