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Related Experiment Video

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Monitoring Protein Adsorption with Solid-state Nanopores

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Published on: December 2, 2011

Atomic-Scale Fluidic Diodes Based on Triangular Nanopores in Bilayer Hexagonal Boron Nitride.

Binquan Luan¹, Ruhong Zhou¹

¹Computational Biological Center , IBM Thomas J. Watson Research , Yorktown Heights , New York 10598 , United States.

|January 11, 2019

Summary

Researchers explored ionic current rectification in nanoscale pores. Triangular nanopores in hexagonal boron nitride (h-BN) showed excellent diode behavior, unlike hexagonal ones, paving the way for miniaturized electronic devices.

Keywords:

2D nanopore bilayer fluidic diode h-BN rectification

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Atomic Force Microscopy Imaging and Force Spectroscopy of Supported Lipid Bilayers

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Published on: July 22, 2015

Area of Science:

Materials Science
Nanotechnology
Computational Physics

Background:

Nanofluidic diodes are crucial for biosensors and lab-on-a-chip devices.
Miniaturizing nanofluidic channels is essential for high-density integration and analyzing small sample volumes.

Purpose of the Study:

To investigate the ionic conductance and rectification properties of nanopores in bilayer hexagonal boron nitride (h-BN).
To explore the potential of atomically thin materials for creating ultra-small diodes.

Main Methods:

Utilized molecular dynamics simulations to model ion transport through nanopores.
Analyzed the conductance of triangular and hexagonal nanopores in h-BN.

Main Results:

Triangular nanopores exhibited significant ionic current rectification, functioning as effective diodes.
Hexagonal nanopores did not show notable rectification.
Determined scaling laws for ionic current (I) with pore size (L): I ∼ L¹ (forward bias) and I ∼ L² (reverse bias).
Pore length was approximately 0.7 nm, near the atomic limit for diodes.

Conclusions:

Bilayer h-BN nanopores, particularly triangular ones, demonstrate excellent diode characteristics at the nanoscale.
The findings support the development of ultra-miniaturized nanofluidic diodes for advanced electronic applications.