Rectification of ionic current in a nanofluidic diode

Nano Lett. 2007 Mar;7(3):547-51. doi: 10.1021/nl062806o. Epub 2007 Feb 21.


We demonstrate rectification of ionic transport in a nanofluidic diode fabricated by introducing a surface charge discontinuity in a nanofluidic channel. Device current-voltage (I-V) characteristics agree qualitatively with a one-dimensional model at moderate to high ionic concentrations. This study illustrates ionic flow control using surface charge patterning in nanofluidic channels under high bias voltages.