Gating arises differently: A strong ion flow causes a charge imbalance that destabilizes pore structure temporarily.
How Nanopores Learn and Adapt Like the Human Brain
Scientists recently made an exciting discovery about nanopores, tiny structures that control ion flow at a molecular level. These pores act like gates or tunnels for ions, allowing materials to pass through cell membranes. Researchers found that nanopores can behave similarly to brain synapses, the parts of our neurons that learn and adapt. This breakthrough could change how engineers build new tech machines inspired by nature’s smartest design: the human brain.
The Mystery of Ion Flow and Nanopores
Nanopores are crucial in many natural and technological processes. In our bodies, some proteins form these pores to protect cells or fight bacteria. In technology, scientists use them for DNA sequencing and sensing molecules. Despite their importance, nanopores sometimes behave unpredictably, especially in two ways: rectification and gating.
What Is Rectification?
As a result of rectification, the flow of ions shifts in response to the direction of the voltage. When the voltage changes from positive to negative or vice versa, the flow of ions through the pore changes in a completely different way. Consequently, the efficiency with which nanopores carry particles is affected by this phenomenon.
What Causes Gating?
Gating happens when ion movement suddenly stops because the nanopore temporarily closes itself down. This shutting disrupts many applications where steady ion flow is needed.
The true causes behind these behaviors remained unclear until a team led by Matteo Dal Peraro and Aleksandra Radenovic at EPFL studied them closely.
The Role of Electrical Charges Inside Nanopores
The research team took bacterial aerolysin pores and modified their interiors by changing charged amino acids lining the channel walls. This altered how electrical charges inside each pore affect ion movement.
A Variety of Charge Patterns Tested
A total of twenty-six distinct charge patterns were examined by the researchers within these modified nanopores at a range of voltages in order to gain a more precise understanding of the impact that charges had on the movement of ions.
Differentiating Fast Rectification from Slow Gating
By applying alternating voltages over time, they could separate quick rectification behaviors from slower gating interruptions in real-time experiments.
The studies revealed that rectification occurs because positive or negative charges inside pores create easier pathways for ions moving one way versus another.
This results in directional preference in ion transport depending on voltage polarity.
Gating arises differently: A strong ion flow causes a charge imbalance that destabilizes pore structure temporarily.
Part of the pore collapses inward and blocks passage until it reopens.
Importantly, if the pore is made rigid enough, this gating disappears completely!
Toward Smarter Technologies with Adaptive Nanopores
This discovery points toward engineering programmable nanopores. By designing pores with specific charge layouts, engineers can either prevent annoying gating or introduce it intentionally for useful effects, such as adaptive sensors or computing elements inspired by brain synapses.
A Nanopore That Learns Like Synapses
The team created a special nanopore that mimics synaptic plasticity — meaning it “learns” from repeated voltage pulses like neural connections do during learning.
This behavior opens possibilities for bio-inspired processors using ions instead of electrons!
This new kind of ionic processor could lead to faster energy-efficient computing devices shaped by biological principles rather than traditional silicon chips.
Additionally, to stay updated with the latest developments in STEM research, visit ENTECH Online. Basically, this is our digital magazine for science, technology, engineering, and mathematics. Further, at ENTECH Online, you’ll find a wealth of information.
Reference:
Mayer, S. F., Mitsioni, M. F., Robin, P., Van Den Heuvel, L., Ronceray, N., Marcaida, M. J., Abriata, L. A., Krapp, L. F., Anton, J. S., Soussou, S., Jeanneret-Grosjean, J., Fulciniti, A., Möller, A., Vacle, S., Feletti, L., Brinkerhoff, H., Laszlo, A. H., Gundlach, J. H., Emmerich, T., . . . Radenovic, A. (2025). Lumen charge governs gated ion transport in β-barrel nanopores. Nature Nanotechnology. https://doi.org/10.1038/s41565-025-02052-6
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I’m a web developer and science writer with a Master’s degree in Computer Applications (MCA) from Pune University.
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