Related Experiment Video
Updated: Apr 4, 2026

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
Published on: April 12, 2018
Engineered Ionic Gates for Ion Conduction Based on Sodium and Potassium Activated Nanochannels.
Qian Liu1, Kai Xiao2, Liping Wen3
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, Beijing Normal University , Beijing 100875, PR China.
Researchers developed biomimetic ionic gates using nanochannels that control ion conduction. These sodium (Na+) and potassium (K+) activated gates show promise for medical applications and biosensors.
Area of Science:
- Biomimetic chemistry
- Nanotechnology
- Materials science
Background:
- Ion conduction is crucial for cellular processes, regulated by biological ion channels.
- Developing synthetic ion channels offers control over cellular functions.
Purpose of the Study:
- To create biomimetic ionic gates for controlled ion conduction.
- To investigate sodium (Na+) and potassium (K+) activated nanochannels for reversible switching.
Main Methods:
- Immobilizing alkali metal cation-responsive crown ethers onto conical polyimide nanochannels.
- Utilizing changes in surface charge, wettability, and pore size for gate switching.
- Comparing the binding strengths and switching behaviors of Na+ and K+ activated gates.
Main Results:
- Developed Na+ activated ionic gates that reversibly control ion conduction.
- Developed K+ activated ionic gates enabling selective cation and anion conduction.
- Observed differences in switching behavior due to varying binding strengths of Na+ and K+ complexes.
Conclusions:
- Biomimetic ionic gates demonstrate tunable control over ion transport.
- These nanochannels offer high sensitivity, selectivity, and stability for applications.
- Potential applications include clinical medicine, biosensors, and drug delivery systems.
Related Concept Videos
Non-gated Ion Channels
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Non-gated Ion Channels
Mechanically-gated Ion Channels
Mechanically-gated Ion Channels
Ion Channels
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Voltage-gated Ion Channels
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several types of...

