Diffusive to Barrier-Limited Transition in the Aqueous Ion Transport through Nanoporous 2D Materials DOI Creative Commons
Yechan Noh, Alex Smolyanitsky

The Journal of Physical Chemistry B, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

The interplay of interactions between aqueous ions and the confinement subnanoscale pores in solid 2D membranes causes a range barrier-limited phenomena, including selective ion trapping permeation, mechanosensitive transport, memristive effects. A clear understanding transition from diffusive to transport regime is lacking, however. Moreover, limits applicability for analytical formalism widely used relate measured data effective pore size are unclear. Here, with goal identifying regimes determining sizes below which fails, we present computational study water-dissociated alkali salt through featuring various sizes. Triangular nitrogen-terminated multivacancies hexagonal boron nitride as simple yet illustrative example uncharged locally dipolar degrees cation selectivity. We find that cation-cation selectivity high mechanosensitivity clearest indicators onset. also show triangular geometries, diffusion-based expected fail when side triangle order ≈2 nm. For circular similar failure diameters ≈1.2 Because an extensive theoretical description major challenge, detailed computer models currently remain most accurate nonexperimental methods investigating regime. Given how sensitively permeation depends on size, our results suggest addition advances fabrication, interpretation vital harnessing unique features ionic molecular nanofluidic systems using nanoporous materials.

Язык: Английский

Nanofluidic Memristive Transition and Synaptic Emulation in Atomically Thin Pores DOI

Ruiyang Song,

Peng Wang,

Haiou Zeng

и другие.

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 29, 2025

Ionic transport across nanochannels is the basis of communications in living organisms, enlightening neuromorphic nanofluidic iontronics. Comparing to angstrom-scale long biological ionic pathways, it remains a great challenge achieve memristors at such thinnest limit due ambiguous electrical model and interaction process. Here, we report atomically thin memristive nanopores two-dimensional materials by designing optimized conductance decouple memristive, ohmic, capacitive effects. By conducting different charged iontronics, realize reconfigurable transition between nonvolatile-bipolar volatile-unipolar characteristics, which arises from distinct processes governed energy barriers. Notably, emulate synaptic functions with ultralow consumption ∼0.546 pJ per spike reproduce learning behaviors. The are similar biosystems angstrom structure, rich iontronic responses, millisecond-level operating pulse width, matching potential width. This work provides new paradigm for boosting brain-inspired devices.

Язык: Английский

Процитировано

1
Nanofluidic Volatile Threshold Switching Ionic Memristor: A Perspective DOI

Miliang Zhang,

Guoheng Xu, Hongjie Zhang

и другие.

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 14, 2025

The fast development of artificial intelligence and big data drives the exploration low-power computing hardware. Neuromorphic devices represented by memristors may provide a possible paradigm beyond von Neumann's architecture because they enable integration processing storage units mimicking how brain processes complex information in parallel. In brain, is processed via multilevel spiking coding event-driven mechanisms, whose simplified neural circuit leaky-integration-and-fire model combining volatile threshold switching capacitors. As unit to emulate working environment explore unique functions ions molecules biological systems, nanofluidic ionic become essential but are still missing. This Perspective will review mechanism role as building block for neuromorphic list three routes ones.

Язык: Английский

Процитировано

0
Diffusive to Barrier-Limited Transition in the Aqueous Ion Transport through Nanoporous 2D Materials DOI Creative Commons
Yechan Noh, Alex Smolyanitsky

The Journal of Physical Chemistry B, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

The interplay of interactions between aqueous ions and the confinement subnanoscale pores in solid 2D membranes causes a range barrier-limited phenomena, including selective ion trapping permeation, mechanosensitive transport, memristive effects. A clear understanding transition from diffusive to transport regime is lacking, however. Moreover, limits applicability for analytical formalism widely used relate measured data effective pore size are unclear. Here, with goal identifying regimes determining sizes below which fails, we present computational study water-dissociated alkali salt through featuring various sizes. Triangular nitrogen-terminated multivacancies hexagonal boron nitride as simple yet illustrative example uncharged locally dipolar degrees cation selectivity. We find that cation-cation selectivity high mechanosensitivity clearest indicators onset. also show triangular geometries, diffusion-based expected fail when side triangle order ≈2 nm. For circular similar failure diameters ≈1.2 Because an extensive theoretical description major challenge, detailed computer models currently remain most accurate nonexperimental methods investigating regime. Given how sensitively permeation depends on size, our results suggest addition advances fabrication, interpretation vital harnessing unique features ionic molecular nanofluidic systems using nanoporous materials.

Язык: Английский

Процитировано

0