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Updated: May 28, 2026

Reconfigurable Microfluidic Channel with Pin-discretized Sidewalls
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Field-effect reconfigurable nanofluidic ionic diodes.

Weihua Guan1, Rong Fan, Mark A Reed

  • 1Department of Electrical Engineering, Yale University, New Haven, Connecticut 06520, USA.

Nature Communications
|October 20, 2011
PubMed
Summary
This summary is machine-generated.

This study introduces a novel field-effect reconfigurable nanofluidic diode. The device allows for in situ modulation of ionic current rectification using gate voltages, enabling programmable control of fluidic transport.

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Area of Science:

  • Nanofluidics
  • Device Physics
  • Electrochemistry

Background:

  • Nanofluidic devices with nanopores and nanochannels exhibit ionic current rectification.
  • Existing devices lack the ability to alter rectifying properties post-fabrication.
  • In situ modulation without external chemical stimuli is highly desirable.

Purpose of the Study:

  • To develop a field-effect reconfigurable nanofluidic diode.
  • To enable in situ, digitally programmable control over ionic current rectification.
  • To provide a building block for reconfigurable ionic circuits.

Main Methods:

  • Fabrication of a nanofluidic diode with an asymmetrically placed gate or dual split-gate.
  • Application of gate voltages to modulate rectification properties.
  • Analysis of ion and molecule conduction under varying electrical fields.

Main Results:

  • Demonstrated regulation of forward/reverse diode directions via gate voltage.
  • Showcased adjustable degrees of ionic current rectification.
  • Achieved electrostatic modulation independent of chemical stimuli.

Conclusions:

  • The field-effect reconfigurable nanofluidic diode offers unprecedented control over fluidic transport.
  • Electrostatic modulation provides a digitally programmable alternative to stimuli-responsive tuning.
  • This technology is crucial for integrating reconfigurable ionic circuits.