Manipulating p‐π Resonance through Methoxy Group Engineering in Covalent Organic Frameworks for an Efficient Photocatalytic Hydrogen Evolution DOI
Zhipeng Luo,

Shipeng Zhu,

Haizhou Xue

et al.

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Kinetic factors frequently emerge as the primary constraints in photocatalysis, exerting a critical influence on efficacy of polymeric photocatalysts. The diverse conjugation systems within covalent organic frameworks (COFs) can significantly impact photon absorption, energy level structures, charge separation and migration kinetics. Consequently, these limitations often manifest unsatisfactory kinetic behavior, which adversely affects photocatalytic activity COFs. To address challenges, we propose methoxy (−OMe) molecular engineering strategy designed to enhance carrier kinetics mitigate mass transfer resistance. Through strategic modulation position quantity −OMe units, effectively manipulate p‐π conjugation, thereby enhancing migration. Moreover, COFs enriched with moieties exhibit enhanced dynamics due hydrophilic nature groups, facilitate diffusion reactants products porous structure. This approach is hypothesized drive an efficient hydrogen evolution reaction.

Language: Английский

Enhancing the performance of polyoxometalate-based memristors in harsh environments based on hydrogen bonding cooperative π-conjugation interaction DOI
Mingze Meng,

Yiqun Gao,

Yi‐Ping Chen

et al.

Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Three water-soluble organic–inorganic hybridized POMs-based memristor are proposed. The introduction of organic ligands improves its performance. mechanism the device during high temperature operation was explored using 2D-COS-IR.

Language: Английский

Citations

0
Multi-functional Synaptic Memristor for Neuromorphic Pattern Recognition and Image Compression DOI
Hao Sun, Siyuan Li, Xiaofei Dong

et al.

Materials Today Physics, Journal Year: 2025, Volume and Issue: unknown, P. 101684 - 101684

Published: Feb. 1, 2025

Language: Английский

Citations

0
Lead-Free Halide Perovskite-Based Flexible Memristor for an Artificial Mechano-nociceptive System DOI
Yuchan Wang, Qian Ran, Ting Chen

et al.

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 3177 - 3184

Published: March 20, 2025

Herein, novel lead-free Cs3Bi2I9 nanocrystals (NCs) were preferred through first-principles calculations and crystal orbital Hamilton population (COHP). An artificial nociceptor was designed using the halide perovskite (HP) NCs doped into poly(methyl methacrylate) (PMMA). The resulting composite material memristor demonstrated remarkable resistive switching performance conductive atomic force microscopy (C-AFM). PMMA&Cs3Bi2I9-based memristors show an ultrafast speed of 30 ns low threshold voltage ≈0.6 V with little variation, which attributed to synergistic effect active metal electrodes vacancy filaments. Impressively, high mechanical bending stability (bending times = 1000) still exhibit excellent resistance state (RS) properties multilevel storage after days exposed ambient conditions. More importantly, fundamental nociceptive functions fully demonstrated. Furthermore, a mechano-nociceptor system simulate mechanism biological pain perception, could selectively react mild harmful stimuli. Our study provides new strategies for developing efficient neuromorphic materials devices.

Language: Английский

Citations

0
Reconfigurable Neuromorphic Computing Using Methyl-Engineered One-Dimensional Covalent Organic Framework Memristors DOI
Pan‐Ke Zhou, Ziyue Yu, Tao Zeng

et al.

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

The rapid evolution of neuromorphic devices seeks to bridge biological neural networks and artificial systems, enabling energy-efficient scalable computing for next-generation intelligence. Herein, we introduce methyl-engineered one-dimensional covalent organic framework (1D COF)-based memristors as a transformative platform reconfigurable computing. incorporation methyl groups enhances localized polarization effects within the COF framework, effectively mitigating random Ag+ migration/diffusion stabilizing conductive filament morphology. This strategic modification yields with exceptional multilevel storage capabilities, exhibiting superior stability, linearity, reproducibility. Moreover, highly ordered architecture customizable chemical environment methyl-functionalized 1D allows precise control over resistive switching behaviors, facilitating emulation synaptic functions development network architectures. Demonstrating performance in tasks such high-accuracy image recognition, these showcase significant promise foundation energy-efficient, systems.

Language: Английский

Citations

0
High‐Performance Memristors Based on Ordered Imine‐Linked Two‐Dimensional Covalent Organic Frameworks for Neuromorphic Computing DOI Creative Commons
Da Huo,

Zhangjie Gu,

Bailing Song

et al.

Interdisciplinary materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

ABSTRACT Covalent organic frameworks (COFs) have emerged as highly promising materials for high‐performance memristors due to their exceptional stability, molecular design flexibility, and tunable pore structures. However, the development of COF faces persistent challenges stemming from structural disorder quality control films, which hinder effective regulation active metal ion migration during resistive switching. Herein, we report synthesis high‐quality, long‐range ordered, imine‐linked two‐dimensional (2D) TP‐TD film via innovative surface‐initiated polymerization (SIP) strategy. The ordered one‐dimensional (1D) nanochannels within 2D facilitate stable directed growth conductive filaments (CFs), further enhanced by imine–CFs coordination effects. As a result, fabricated memristor devices exhibit multilevel nonvolatile memory performance, achieving an ON/OFF ratio up 10 6 retention time exceeding 2.0 × 5 s, marking significant breakthrough in porous polymer (POP) memristors. Furthermore, demonstrate high‐precision waveform data recognition with accuracy 92.17%, comparable software‐based systems, highlighting its potential advanced signal processing tasks. This study establishes robust foundation significantly broadens application neuromorphic computing.

Language: Английский

Citations

0
Electric Eels Inspired Iontronic Artificial Skin with Multimodal Perception and In‐Sensor Reservoir Computing DOI
Haiqing Pei,

Huiqian Hu,

Yu Dong

et al.

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

Published: April 18, 2025

Abstract As the largest sensory organ, human skin generates ionic signals in response to tactile, thermal, and electrical stimuli, which are then transmitted neurons processed by brain, thereby enabling sensing memory, ultimately promoting conscious perception decision‐making. However, existing artificial skins face significant challenges including inability achieve multimodal memory simultaneously (i.e., stimuli), difficulty detecting ultra‐low currents, limitations rich synaptic behaviors that essential for highly efficient in‐sensor reservoir computing. Inspired electric eels, study here develops an based on iontronic p‐n junctions consisting of PolyAT PolyES bi‐layered structures. This features broad detection ranges temperature (−80 120 °C, well beyond reach hydrogel counterparties), pressure (0.075 Pa 400 kPa, among highest sensitivities ever reported), current (1–200 nA), meanwhile demonstrates functions. Additionally, incorporating a robotic hand can grasp objects with different temperatures weights demand. Further, fully memristive computing is implemented skin, allowing sensing, decoding, learning via stimulation, achieving 91.3% accuracy classifying MNIST handwritten digit images.

Language: Английский

Citations

0
Donor‐redox covalent organic framework‐based memristors for visual neuromorphic system DOI Creative Commons

Qiongshan Zhang,

Qiang Che,

Fu‐Zhen Xuan

et al.

InfoMat, Journal Year: 2025, Volume and Issue: unknown

Published: May 12, 2025

Abstract Artificial visual neural systems have emerged as promising candidates for overcoming the von Neumann bottleneck via integrating image perception, storage, and computation. Existing photoelectric memristors are limited by need specific wavelengths or long input times to maintain stable behavior. Here, we introduce a benzothiophene‐modified covalent organic framework, enhancing response of methyl trinuclear copper low‐voltage (0.2 V) redox processes. The material enables modulation 50 conductive states light electrical signals, improving recognition accuracy in low light, dense fog, high‐frequency motion. ITO/BTT‐Cu 3 /ITO device's increases from 7.1% with 2 87.1% after training. This construction strategy synergistic effect interactions offer new pathway development neuromorphic computing elements capable processing environmental information situ.

Language: Английский

Citations

0
Intermolecular Hydrogen‐Bond Stabilized 1D Pyrene‐Based Covalent Organic Framework for Advanced Memory Devices and Neuromorphic Computing DOI

Yuxing Huang,

Wanxiang Yang,

Pan‐Ke Zhou

et al.

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

Published: May 12, 2025

Abstract Covalent organic frameworks (COFs) have emerged as a compelling class of materials for active layers in memristors, yet the determinants their electrical properties and effective tuning strategies remain elusive. Herein, study unveils two novel pyrene‐based COFs (Py‐COFs)—the one‐dimensional (1D) H‐Py‐BT COF two‐dimensional (2D) Py‐BT COF—crafted with structural kinship divergent dimensionalities via tailored pyrene monomer connectivity. The effect dimensional disparities on memristive device performance image recognition precision is systematically investigated. Notably, 1D harnesses weak in‐plane interlayer hydrogen bonding interactions to enhance charge separation promote directional electron transport. This unique configuration enables devices fabricated (101 nm thick) deliver exceptional performance, evidenced by high ON/OFF current ratio (≈10 3.7 ) an accuracy 76%, outperforming those based 2D COF. These findings underscore pivotal role dimensionality molecular dictating functionality, offering valuable insights advancing COF‐based technologies.

Language: Английский

Citations

0
Emissive Covalent Organic Frameworks: Fluorescence Improvement via a Controllable Vertex Strategy and Chemical Sensing DOI

Dongxue Wei,

Wanyi Zhao,

Ce Xing

et al.

ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(14), P. 8498 - 8504

Published: July 4, 2024

Creating highly emissive covalent organic frameworks (COFs) has traditionally been difficult, owing to strong π–π interactions between adjacent layers, resulting in aggregation-caused quenching properties. In this article, we report the use of a vertex strategy create COFs with enhanced fluorescence performances. This involved introducing different units into COF structure. These including N atoms possessed p orbital lone pairs electrons, which formed p−π conjugation linkages and walls COFs. The from effectively suppressed effect COFs, leading development emission designed were evaluated for their ability detect 2,4,6-trinitrophenol, specific type nitro-explosive, water. demonstrated high sensitivity selectivity 2,4,6-trinitrophenol detection compared other nitro-explosives. summary, controllable is promising method designing enhancing properties, paving way luminescent materials diverse applications.

Language: Английский

Citations

3
Rational Design of Fluorinated 2D Polymer Film Based on Donor–Accepter Architecture toward Multilevel Memory Device for Neuromorphic Computing DOI
Lei Liu, Wenyan Ji,

Weixin He

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 17, 2024

Abstract Fluorine‐containing 2D polymer (F‐2DP) film is a desired system to regulate the charge transport in organic electronics but rather rarely reports due limited fluorine‐containing building blocks and difficulties synthesis. Herein, novel polar molecule with antiparallel columnar stacking synthesized further embedded into an F‐2DP control over crystallinity of through self‐complementary π ‐electronic forces. The donor–accepter–accepter′–donor′ (D–A–A′–D′) structure regulates transportation efficiently, inducing multilevel memory behavior stepwise capture transfer processes. Thus, device exhibits ternary low threshold voltage ( V th1 1.1 V, th2 2.0 V), clearly distinguishable resistance states (1:10 2 :10 4 ) yield (83%). Furthermore, formation complex endows wider range conductive state, which allows its application brain‐inspired neuromorphic computing. Modified National Institute Standards Technology recognition can reach accuracy 86%, showing great potential computing applications post‐Moore era.

Language: Английский

Citations

3