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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Nanofluidic Membrane‐Assisted Organic Electrochemical Transistors for Bioinspired Gustatory Sensation Based on Selective Cation Transport

Small, Journal Year: 2024, Volume and Issue: 20(42)

Published: July 3, 2024

Natural organisms have evolved precise sensing systems relying on unique ion channels, which can efficiently perceive various physical/chemical stimuli based ionic signal transmission in biological fluid environments. However, it is still a huge challenge to achieve extensive applications of the artificial counterparts as an efficient wet platform due fluidity working medium. Herein, nanofluidic membranes with selective cation transport properties and solid-state organic electrochemical transistors (OECTs) amplified signals are integrated together mimic human gustatory sensation, achieving reagent recognition portable configuration. Cu-HHTP through their uniform micropores constructed first, followed by assembly OECTs form designed membrane-assisted (nanofluidic OECTs). As result, they distinguish typically reagents, even liquids (ILs), demonstrating enhanced perception performance under wide concentration range (10

Language: Английский

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Current Advances of CO Sensing Based on Low Dimensional Materials

Langmuir, Journal Year: 2024, Volume and Issue: 40(36), P. 18821 - 18836

Published: Aug. 28, 2024

Carbon monoxide (CO) is a harmful gas with significant impacts on human health and the environment. Its timely detection, especially in event of thermal runaway automotive lithium batteries, crucial to prevent casualties. This paper reviews progress development efficient, sensitive, reliable CO sensors, focusing electrochemical, optical, resistive sensing materials. Low-dimensional materials have large specific surface area, providing an abundant number active sites, which has drawn extensive attention from researchers. According different sensor signals, we categorized these sensors into electrical optical signal sensors. We hope that by systematically introducing mechanism performance two kinds appropriate can be developed application scenarios so as realize early warning monitoring maximum extent, reduce industrial losses, ensure life personnel.

Language: Английский

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Multiscale Covalent Organic Framework (COF) Films for Task-Specific Sensing in Multicomponent Gases

ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 5454 - 5478

Published: Nov. 18, 2024

Gas sensing is vital for ecological protection in agriculture, early disease diagnosis biomedicine, and safety industrial production. Covalent organic frameworks (COFs), a new class of porous polymer materials, can be customized through specific ligand selection to tailor pore sizes active sites, enabling them selectively enrich interact with targeted gas molecules, making promising candidates sensing. To advance their use this field, it essential investigate the mechanisms complex interactions between COFs target molecules as well improve COF film fabrication methods. This review outlines design strategies films across multiscale: molecular interaction mechanisms, macroscopic interfacial synthesis methods, microscale/nanoscale approaches such double-layer filtration micro/nanostructured improved transfer. Finally, several key research directions are proposed suitability COF-based materials environments.

Language: Английский

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Bioinspired multi-scale interface design for wet gas sensing based on rational water management

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(17), P. 3996 - 4014

Published: Jan. 1, 2024

Current advances in wet gas sensing are highlighted taking advantage of optimized mass transport pathways endowed by multi-scale interface design.

Language: Английский

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Enhanced Ionic Power Generation via Light‐Driven Active Ion Transport Across 2D Semiconductor Heterostructures

Small, Journal Year: 2024, Volume and Issue: unknown

Published: June 3, 2024

Abstract 2D semiconductor heterostructures exhibit broad application prospects. However, regular nanochannels of rarely caught the researcher's attention. Herein, a metal–organic framework (i.e., Cu 3 (HHTP) 2 ) and transition metal dichalcogenides MoS )‐based multilayer van der Waals heterostructure /MoS realized band alignment‐dominated light‐driven ion transport further light‐enhanced ionic energy generation. High‐density channels provide high‐speed pathways for transmembrane transport. Upon light illumination, net flow occurs at symmetric concentration, suggesting directional cationic from to . This is because containing type‐II alignment can generate photovoltaic motive force through light‐induced efficient charge separation drive After introducing into power generation system, maximum density under illumination achieve notable improvement different concentration differences. In addition force, material defect capture‐induced surface increase also raise selectivity flux, greatly facilitating work demonstrates that with rational not only be potential platform optimizing harvesting but new thought biomimetic iontronic devices.

Language: Английский

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Rational MOF Membrane Design for Gas Detection in Complex Environments

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 23, 2024

Abstract Metal‐organic frameworks (MOFs) hold significant promise in the realm of gas sensing. However, current understanding their sensing mechanisms remains limited. Furthermore, large‐scale fabrication MOFs is hampered by inadequate mechanical properties. These two challenges contribute to sluggish development MOF‐based gas‐sensing materials. In this review, selection metal ions and organic ligands for designing first presented, deepening interactions between different ions/organic target gases. Subsequently, typical interfacial synthesis strategies (gas‐solid, gas‐liquid, solid‐liquid interfaces) are provided, highlighting potential constructing MOF membranes on superhydrophobic and/or superhydrophilic substrates. Then, a multi‐scale structure design proposed, including multi‐dimensional membrane heterogeneous design, improve performance through enhanced mass transfer specific sieving. This strategy anticipated augment task‐specific capabilities materials complex environments. Finally, several key future research directions outlined with aim not only further investigate underlying principles but also achieve efficient detection gases amidst interfering elevated moisture levels.

Language: Английский

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Hammerhead Shark‐Inspired Microvillus‐Structured Ionic Elastomers for Wet Gas Sensing Based on Solvated Ion Transport

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract Water molecules are ubiquitous disruptors of conventional gas sensing materials, often leading to diminished performance in materials that reliant on electronic signal transmission. This creates the pressing need for efficient with anti‐humidity interference properties. Here, a hammerhead shark‐inspired microvillus‐structured ionic elastomer based transmission nanoconfined space is constructed by incorporating liquids into polymer matrix. The elastomers optimized microvillus structure demonstrated 1.68‐fold higher response than flat ones, short time (9 s) toward 30 ppm triethylamine (TEA), excellent selectivity and low limit detection (LOD) (104.56 ppb). Such serves as proof‐of‐concept effectively combining solvated ion transport design develop advanced systems. With such an evident (23.52%), similar (12 s), LOD (498.05 ppb), long‐term stability (at least days) achieved at relative humidity 70%. Mechanistic investigations revealed effective ions facilitated after sequential water TEA surroundings while significantly enhanced transport. Furthermore, utility system shrimp decay monitoring under wet conditions.

Language: Английский

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Pt@WS₂ Mott–Schottky Heterojunction Boosts Light-Driven Active Ion Transport for Enhanced Ionic Power Harvesting

ACS Nano, Journal Year: 2024, Volume and Issue: 18(52), P. 35729 - 35737

Published: Dec. 16, 2024

Bioinspired light-driven ion transport in two-dimensional (2D) nanofluidics offers exciting prospects for solar energy harvesting. Current single-component nanofluidic membranes often suffer from low light-induced driving forces due to the easy recombination of photogenerated electron–hole pairs. Herein, we present a Pt@WS2 Mott–Schottky heterojunction-based 2D membrane boosting active and enhanced ionic power The photovoltaic effect heterojunctions photoconductance WS2 multilayers account more efficient charge separation across membrane. In an equilibrium electrolyte solution, observe directional cationic Pt region under visible-light illumination. 10–3 M KCl electrolyte, photocurrent photovoltage reach 11.84 μA cm–2 30.67 mV, respectively. Moreover, output can up 5.02 W m–2 light illumination, compared value 2.56 without irradiation. This work not only introduces mechanism but also pathway integrating multiple sources.

Language: Английский

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Nanofluidic homogeneous membranes with light-driven active ion transport properties for blue energy harvesting

Cell Reports Physical Science, Journal Year: 2024, Volume and Issue: 5(7), P. 102051 - 102051

Published: June 17, 2024

Salinity gradient energy harvesting is still limited to rather small working areas in laboratories. Here, we report a thylakoid-inspired nanofluidic system based on two-dimensional homogeneous multilayer membrane for salinity harvesting, assisted by light-driven active ion transport. The assembled graphene oxide (GO) nanosheets decorated with photoelectric 5,10,15,20-tetrakis(4-aminophenyl) porphyrin molecules, denoted as TGO. Upon light illumination the low concentration side, photovoltaic established via light-induced charge separation drive cation transport from unilluminated side illuminated through interlayer spacing. Combining self-diffusive transport, TGO shows an enhanced output power density of 1.17 W m−2 area 0.2 mm2 under 50-fold gradient, ∼54% increase original. Furthermore, applications different electrolyte solutions mono- or multications confirm feasibility photoenhanced 43% combination artificial seawater/river water.

Language: Английский

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