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Tunable Nanopore Arrays as the Basis for Ionic Circuits.

Rachel A Lucas¹, Zuzanna S Siwy¹

¹Department of Physics and Astronomy, University of California, 210G Rowland Hall, Irvine, California 92697, United States.

ACS Applied Materials & Interfaces

|December 7, 2020

Summary

This summary is machine-generated.

Researchers modeled ion transport in nanopore arrays, showing gate voltage can control ionic flow across multiple pores. This work inspires new ionic circuits mimicking biological systems for signal transduction.

Keywords:

array concentration polarization ionic circuit ionic diode nanopore rectification

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Area of Science:

Nanotechnology and Nanoscience
Physical Chemistry
Biophysics

Background:

Biological systems utilize cell membranes with multiple pores for signal transmission and physiological processes.
Interest exists in creating artificial ionic circuits for manipulating ion and molecular transport.
Nanopore arrays offer a platform for developing such artificial systems.

Purpose of the Study:

To model ion transport through small arrays of nanopores (3, 6, and 9 pores).
To investigate the effect of an integrated gate electrode on ionic transport.
To explore conditions for controlling ionic transport and rectification properties in nanopore arrays.

Main Methods:

Computational modeling of ion transport through nanopore arrays.
Integration of a gate electrode near nanopore openings.
Analysis of current-voltage characteristics and rectification properties under varying gate voltages.

Main Results:

Gate voltage tuning affects ionic transport through all nanopores in an array.
Specific conditions allow the same gate voltage to induce opposite rectification in neighboring nanopores.
An embedded ionic diode can modulate neighboring pore transport even without gate voltage, due to concentration polarization and overlapping depletion zones.

Conclusions:

Nanopore arrays with gate electrodes can effectively transduce signals, controlling ionic transport across multiple pores.
The findings provide a basis for designing advanced nanopore-based devices for signal processing.
This research inspires future experimental efforts towards creating functional ionic circuits mimicking biological signal transduction.