Self‐Powered Switchable Gas‐Humidity Difunctional Flexible Chemosensors Based on Smart Adaptable Hydrogel

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 6, 2025

Abstract The development of self‐powered, flexible, and multi‐function sensors is highly anticipated in wearable electronics, however, it remains a daunting challenge to identify different signals based on single device with singular sensing material without algorithmic support. Here, smart adaptable hydrogel developed by co‐introducing two ions vastly hydrophilicity for the construction an electrochemically reversibly switchable difunctional chemosensor metal‐air battery structure. prepared can readily switch between water‐rich water‐deficient states crosstalk‐free detection oxygen humidity respectively, since O 2 gas water molecules directly participate reduction reaction act alone as limiting reactants catalysts affect rate under states. resulting sensor demonstrates breakthrough performance sensitivities high 4170.5%/% 380.2%/% RH states, ultrawide ranges. Thanks these, devices be applied real‐time remote monitoring ambient oxygen, transcutaneous pressure changes, respiration, skin moisture combining wireless communication technology, therefore have important application prospects fields safety, health management, non‐contact human‐machine interaction.

Язык: Английский

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Antifreezing Ultrathin Bioionic Gel-Based Wearable System for Artificial Intelligence-Assisted Arrhythmia Diagnosis in Hypothermia

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

Cardiovascular disease (CAD) is a major global public health issue, with mortality rates being significantly impacted by cold temperatures. Stable and reliable electrocardiogram (ECG) monitoring in environments crucial for early detection treatment of CAD. However, existing skin sensor struggle to balance freeze resistance, breathability, flexibility, conductivity adhesion at Here, we introduce solvent cross-linking strategy an situ transfer method prepare ultrathin bioionic gels, featuring freezing point below -80 °C thickness only 12.6 μm. The strong abundant interactions between the ionic liquid zwitterionic polymer effectively suppress low-temperature crystallization, forming toughened highly adhesive network structure. This enables formation morphology, which can be seamlessly transferred onto various substrates. Furthermore, solvent-cross-linked maintains large interpolymer chain spacing, facilitating rapid ion transport pathways. Even subzero temperatures, gel its multifunctionality, demonstrating tissue-like softness (34.6 kPa), high (10.06 mS cm-1), excellent stretchability (360%), transparency, robust strength (175.3 kPa) interfacial toughness (1146 J m-2). Integrated into flexible wearable device, ensures conformity, user comfort, signal-to-noise ECG signal acquisition. Leveraging artificial neural network, system analyzes bradycardia signals achieves 96.88% accuracy arrhythmia under conditions. gel-based presents promising solution CAD diagnosis prediction extreme environments.

Язык: Английский

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A strong, tough, and high-efficiency hydrogel thermocell for thermal energy harvesting

Nano Energy, Год журнала: 2025, Номер unknown, С. 110878 - 110878

Опубликована: Март 1, 2025

Язык: Английский

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Solvent-Free Ion-Conductive Xerogels with High Conductivity and Adhesion Enable Multimodal Sensing

Gels, Год журнала: 2025, Номер 11(4), С. 242 - 242

Опубликована: Март 26, 2025

Ion-conductive gels (ICGs) are essential for achieving human–machine interfaces, bioelectronic applications, or durable wearable sensors. However, traditional solvent-dependent ICGs face bottlenecks such as dehydration-induced failure and challenges in a balance between conductivity mechanical properties. Here, this work developed novel ternary ion-conductive xerogel (PEM-Li ICXG) system based on polyethylene glycol (PEG), poly (2-methoxyethyl acrylate) (PMEA), LiTFSI. PEM-Li ICXGs exhibit high (2.7 × 10−2 S/m), adhesive capability (0.34 MPa), solvent-free characteristics. Remarkably, the incorporation of ions into simultaneously optimizes their performance. We demonstrate application flexible sensors strain temperature sensing. The proposed synthesis strategy is straightforward may further inspire design high-performance ICXGs.

Язык: Английский

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Hydrogel-Based Continuum Soft Robots

Gels, Год журнала: 2025, Номер 11(4), С. 254 - 254

Опубликована: Март 27, 2025

This paper comprehensively reviews the latest advances in hydrogel-based continuum soft robots. Hydrogels exhibit exceptional flexibility and adaptability compared to traditional robots reliant on rigid structures, making them ideal as biomimetic robotic skins platforms for constructing highly accurate, real-time responsive sensory interfaces. The article systematically summarizes recent research developments across several key dimensions, including application domains, fabrication methods, actuator technologies, sensing mechanisms. From an perspective, span healthcare, manufacturing, agriculture. Regarding techniques, extensively explores crosslinking additive microfluidics, other related processes. Additionally, categorizes thoroughly discusses various actuators solute/solvent variations, pH, chemical reactions, temperature, light, magnetic fields, electric hydraulic/electro-osmotic stimuli, humidity. It also details strategies designing implementing diverse sensors, strain, pressure, humidity, conductive, magnetic, thermal, gas, optical, multimodal sensors. Finally, offers in-depth discussion of prospective applications robots, particularly emphasizing their potential medical industrial fields. Concluding remarks include a forward-looking outlook highlighting future challenges promising directions.

Язык: Английский

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A Robust and Tough Composite Hydrogel Electrolyte with Anion‐Locked Supramolecular Network for Zinc Ion Batteries

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Hydrogel electrolytes have garnered extensive attention in zinc ion batteries due to their excellent flexibility and good safety. However, limited mechanical properties, low ionic conductivity, poor Zn2+ transference number pose significant challenges for developing high-performance batteries. Herein, this work constructs a 3D supramolecular network capable of locking anions active water molecules through the abundant hydrogen bonding interactions between aramid nanofibers, polyvinyl alcohol, anions. This synergistically enhances properties (with strength 0.88 MPa toughness 3.28 MJ m-3), conductivity (4.22 S m-1), (0.78). As result, composite hydrogel electrolyte can effectively inhibit dendrite growth side reactions, facilitate interface regulation, enable uniform deposition. The Zn anode exhibits cycle life 1500 h at 5 mA cm-2 mAh cm-2, with an average coulombic efficiency 99.1% over 600 cycles. Additionally, Zn||polyaniline full cell maintains high capacity retention 78% after 9100 cycles 1 A g-1. assembled pouch cells demonstrate flexibility, deformability, compression resistance. provides valuable insights into design

Язык: Английский

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Anti-freezing, adhesive and conductive hydrogel for flexible sensors and deep learning assisted Triboelectric nanogenerators

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162828 - 162828

Опубликована: Апрель 1, 2025

Язык: Английский

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Tough fiber-reinforced composite ionogels with crack resistance surpassing metals

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Апрель 29, 2025

Язык: Английский

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