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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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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Bioinspired Electrolyte-Gated Organic Synaptic Transistors: From Fundamental Requirements to Applications

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: March 24, 2025

Abstract Rapid development of artificial intelligence requires the implementation hardware systems with bioinspired parallel information processing and presentation energy efficiency. Electrolyte-gated organic transistors (EGOTs) offer significant advantages as neuromorphic devices due to their ultra-low operation voltages, minimal hardwired connectivity, similar environment electrophysiology. Meanwhile, ionic–electronic coupling relatively low elastic moduli channel materials make EGOTs suitable for interfacing biology. This review presents an overview device architectures based on electrochemical field-effect transistors. Furthermore, we requirements consumption tunable synaptic plasticity in emulating biological synapses how they are affected by materials, electrolyte, architecture, mechanism. In addition, summarize basic principle sensory recent progress a building block systems. Finally, current challenges future discussed.

Language: Английский

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