Retina‐Inspired Nanofluidic Membranes for Underwater Visual Imaging Based on Active Ion Transport

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: March 30, 2024

Abstract Through evolution, biological organisms have developed ways to sense light using ion channels, which holds several advantages, such as energy efficiency and water resistance, over humanmade optoelectronic devices. Herein, a retina‐inspired nanofluidic system is presented with Janus heterogeneous membrane (J‐HM), can achieve underwater visual imaging through light‐driven active transport. The J‐HMs are obtained sequentially assembled WS 2 , kind of metal–organic framework nanosheets via the reaction between 2,3,6,7,10,11‐hexahydroxytriphenylene hydrate (HHTP) Cu 2+ (Cu‐HHTP). Due formed intramembrane electric field caused by efficient charge separation under illumination, photovoltaic driving force generated for transport from Cu‐HHTP . Furthermore, unidirectionally be enhanced self‐diffusion concentration gradient. J‐HM single‐pixel design shows nearly linear response intensity has enough resolution basic object recognition well long‐term memory after data processing defined pixelated matrix, pave an avenue designing more intelligent sensing systems.

Language: Английский

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Enhanced Gating Effects in Responsive Sub-nanofluidic Ion Channels

Accounts of Materials Research, Journal Year: 2023, Volume and Issue: 4(9), P. 786 - 797

Published: Aug. 1, 2023

ConspectusThe smart regulation of ion flow in biological channels (BICs) is vital to life. In general, intelligent BICs possess three main functions: (i) selectively transfer specific ions, (ii) quickly conduct and (iii) responsively control the ions. Since early exploration potassium (K+) sodium (Na+) began 1950s, gating behaviors have been investigated for more than 70 years. Taking first reported voltage-gated transport process as an example, a gate, which acts voltage sensor BICs, detects variation membrane voltage, triggering opening closing channels. A ratio (GR) can describe effect BIC, GR = IOpen/IClosed, where IOpen IClosed are measured currents channel at open closed states, respectively. usually strong effects with extraordinarily high ratio, be up infinity zero-current states. Inspired by nature, artificial (AICs) constructed permeation intelligently. 2004, wide range AICs developed regulate ions via external stimulation (i.e., light, pH, magnetic field, temperature). These nanochannels, intrinsic or guest functionalities that responsive environmental simulation, drive However, performances such nanoscale ratios between 1 30) far below those due relatively larger nanopores AICs, cannot entirely block off Over past decade, emerging advanced materials 1D nanotubes, 2D nanosheets, 1D-3D sub-nanoporous frameworks) sub-nanometer pores stimuli-responsive properties provided promising tools fabricate sub-nanofluidic efficient performance. remarkably comparable their counterparts, because confined spaces enable effective state Our team has series based on metal–organic frameworks, covalent organic nanosheets. exhibit much higher on–off nanofluidic do, maintained over ionic concentrations. Moreover, also show stimuli-tunable selectivity blockage effects. Therefore, this Account summarizes recent progress fabrication functionalization methods constructing sub-nanoscale then compare principles sub-nanochannels before discussing unique large effect, selectivity, applicable concentration range). Next, applications channels/membranes sensing energy harvesting, adsorption, separation presented. Finally, we offer perspective future development further improve performance real-world devices.

Language: Английский

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Amphoteric metal–organic framework subnanochannels with pH-tuneable cation and anion sieving properties

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(25), P. 13223 - 13230

Published: Jan. 1, 2023

UiO-66-type amphoteric metal–organic frameworks (MOFs) containing both amino and carboxylic groups are synthesized grown within PET subnanochannels to investigate the influence of functional on cation/anion ion transport properties.

Language: Английский

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Functionalization of Cluster-Nodes in a Metal–Organic Framework for Light-Manipulating Proton Conduction

ACS Materials Letters, Journal Year: 2023, Volume and Issue: 6(2), P. 461 - 465

Published: Dec. 29, 2023

Light-responsive proton conductors, which emulate biological pumps, have garnered significant research attention due to their wide-ranging applications in bioelectronics and smart devices. Herein, we demonstrate the first example of functionalization cluster-nodes a metal–organic framework (MOF) for attaining light-responsive conduction. Specifically, photoactive molecules azobenzene-4,4′-dicarboxylic acid (AZOA) are grafted onto Zr6(μ3-O)4(μ3-OH)4 nodes MOF-808 through partial substitution terminal formates, giving MOF-808-AZOA. Remarkably, MOF-808-AZOA exhibits switchable conduction responsive UV light, featuring substantial ON/OFF ratio, rapid response time, good reversibility. Molecular simulations indicate that is attributed differential interactions between terminated formates −COOH group AZOA with its cis- or trans-configuration. Given diversity cluster-based MOFs, this study opens up promising avenue realizing stimuli-responsive proton-conducting MOFs cluster-node functionalization.

Language: Английский

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Crystalline porous framework-based membrane as a sub-nanometer platform for lithium extraction

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 515, P. 215971 - 215971

Published: May 20, 2024

Language: Английский

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Manipulation of ionic transport behavior in smart nanochannels by diffuse bipolar soft layer

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Soft bipolar nanochannels provide distinct and valuable understanding of the intricate relationship among shape, charge distribution, concentration, flow dynamics. This study investigates intriguing realm nanoscale structures, where two configurations soft layers with varying charges an but appealing setting for movement management ions, as well regulation control ionic species in five various geometries. It generates cylindrical, trumpet, dumbbell, hourglass, conical forms. The are coated a diffuse polyelectrolyte layer, density distribution layer is described using step function. To enhance accuracy, impact partitioning taken into account. investigate effect polarity, types were considered: Type I II. In I, negative pole at start, while II, positive start. Thus, features arrangement negative–positive (NP), whereas II has positive–negative (PN) configuration. research was conducted under stationary conditions finite element method, Poisson–Nernst–Planck, Navier–Stokes equations. By manipulating variables such order, bulk numerical analysis performed to these on current–voltage parameters. results demonstrate serves more effective receiver generating greater rectification. For instance, dumbbell-shaped nanochannel exhibits rectification 2046 concentration 1 mM lowest layer. From alternative perspective, conductivity significantly influenced by concentration. study's findings fundamental principles have profound implications diverse applications nanochannels. capacity regulate manipulate ion transport through can result enhanced efficiency, selectivity, performance processes.

Language: Английский

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Flexible UiO-66-(COOH)2 metal–organic framework membranes for salinity gradient power generation

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 476, P. 146649 - 146649

Published: Oct. 14, 2023

Metal-organic frameworks (MOFs) with high-density sub-nanometer pores and plenty of charged functional groups are ideal candidates for salinity gradient energy harvesting. However, synthesizing flexible scalable MOF membranes high performance harvesting remains a challenge. Here we develop vertically aligned UiO-66-(COOH)2/polyethylene terephthalate (PET) The PET/UiO-66-(COOH)2 fabricated by growing UiO-66-(COOH)2 crystals into nanochannels the PET via nanoconfined interfacial growth method. as-synthesized improved cation selectivity over membranes. produce power density 1.3 W m−2 under 0.5 M/0.01 M KCl solutions, which is better than performances thickness 10 µm. This work demonstrates that MOFs-functionalized flexibility, scalability, ion promising

Language: Английский

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Emerging Liquid‐Based Memristive Devices for Neuromorphic Computation

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract To mimic the neural functions of human brain, developing hardware with natural similarities to nervous system is crucial for realizing neuromorphic computing architectures. Owing their capability emulate artificial neurons and synapses, memristors are widely regarded as a leading candidate achieving computing. However, most current memristor devices solid‐state. In contrast, biological systems operate within an aqueous environment, brain accomplishes intelligent behaviors such information generation, transmission, memory by regulating ion transport in neuronal cells. achieve that more analogous energy‐efficient, based on liquid environments developed. contrast traditional solid‐state memristors, liquid‐based possess advantages anti‐interference, low energy consumption, heat generation. Simultaneously, they demonstrate excellent biocompatibility, rendering them ideal option next generation intelligence systems. Numerous experimental demonstrations reported, showcasing unique memristive properties novel functionalities. This review focuses recent developments discussing operating mechanisms, structures, functional characteristics. Additionally, potential applications development directions proposed.

Language: Английский

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Proton Conduction in Zirconium-Based Metal–Organic Frameworks for Advanced Applications

ACS Applied Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Zirconium-based metal-organic frameworks (Zr-MOFs) have emerged as a promising class of crystalline porous materials, attracting significant interest in the field proton conduction due to their exceptional chemical stability, structural flexibility, and functional tunability. Notably, proton-conducting Zr-MOFs show immense potential for diverse advanced technological applications. In this Spotlight on Applications paper, we provide an overview spotlight recent progress utilization exchange membranes membrane fuel cells (PEMFCs), light-responsive systems pumps, sensors formic acid detection. Furthermore, also discussed challenges, future prospects, opportunities promoting application Zr-MOFs.

Language: Английский

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Piezoelectric Molecular Selection Pump Based on Stokes’ Principle

ACS Applied Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 25, 2025

Language: Английский

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