Related Experiment Video
Updated: Jun 19, 2026
13:56
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Boron nitride nanotubes selectively permeable to cations or anions
Tamsyn A Hilder1, Daniel Gordon, Shin-Ho Chung
1Computational Biophysics Group, Research School of Biology, Australian National University, ACT 2601, Australia. tamsyn.hilder@anu.edu.au
Small (Weinheim an Der Bergstrasse, Germany)
|October 2, 2009
Summary
Boron nitride nanotubes can mimic biological ion channels, showing selective permeability to cations or anions. This discovery opens doors for advanced biosensors and filtration technologies.
Area of Science:
- Biophysics
- Materials Science
- Nanotechnology
Background:
- Biological ion channels are crucial for cell function, regulating membrane potential and signaling.
- Selective ion permeability is a key characteristic of these biological channels.
Purpose of the Study:
- To theoretically investigate the potential of boron nitride nanotubes (BNNTs) as artificial ion channels.
- To characterize the ion transport properties of BNNTs.
Main Methods:
- Utilized distributional molecular dynamics, a hybrid simulation technique.
- Analyzed free energy profiles, water-ion structure, and transport properties (current-voltage, current-concentration).
Main Results:
- BNNTs with specific radii (4.83 Å and 5.52 Å) exhibited selective cation and anion permeability, respectively.
- Mimicked permeation characteristics of biological channels like gramicidin and chloride channels.
- Detailed the energetic and structural aspects of ion passage through BNNTs.
Conclusions:
- Boron nitride nanotubes show promise as functional analogs of biological ion channels.
- Engineered BNNTs have potential applications in biosensing, antimicrobial agents, and filtration systems.
Related Concept Videos
01:24Non-gated Ion Channels
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
01:24Non-gated Ion Channels
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
01:15Potentiometry: Membrane Electrodes
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...