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Updated: May 4, 2026

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Published on: October 31, 2013

pH-regulated ionic current rectification in conical nanopores functionalized with polyelectrolyte brushes.

Zhenping Zeng¹, Ye Ai, Shizhi Qian

¹School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Physical Chemistry Chemical Physics : PCCP

|December 21, 2013

Summary

This summary is machine-generated.

Synthetic nanopores with pH-tunable polyelectrolyte brushes show pH-sensitive ionic current rectification (ICR). This research offers insights into controlling ion transport for nanoscale applications.

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Area of Science:

Nanotechnology and Nanoscience
Physical Chemistry
Biophysics

Background:

Biological ion channels regulate transport via pH sensitivity.
Synthetic nanopores offer potential for nanoscale transport control.
Polyelectrolyte brushes on nanopores can be functionalized for tunable properties.

Purpose of the Study:

To theoretically investigate ionic current rectification (ICR) in conical nanopores functionalized with pH-tunable polyelectrolyte (PE) brushes.
To analyze the influence of pH and salt concentration on ICR.
To provide guidelines for designing PE-brush-functionalized nanopores for pH-tunable applications.

Main Methods:

Theoretical study of ICR in a conical nanopore.
Modeling of PE brushes with pH- and salt-dependent charge.
Analysis of ion transport under varying pH and background salt concentrations.

Main Results:

ICR magnitude and direction are sensitive to pH stimuli.
Background salt concentration significantly affects PE brush charge and ICR.
The study demonstrates pH-tunable ionic transport control.

Conclusions:

PE-brush-functionalized nanopores exhibit pH-regulated ICR.
Understanding these effects is crucial for designing advanced nanoscale devices.
This work provides a foundation for developing smart nanopores for targeted applications.