Super-elastic and Multifunctional Graphene Aerogels with Multilayer Cross-linked Pore Structure for Dynamic Force Sensing Arrays

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120105 - 120105

Published: Feb. 1, 2025

Language: Английский

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Enhanced Percolation Effect in Sub‐100 Nm Nanograting Structure for High‐Performance Bending Insensitive Flexible Pressure Sensor

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

Published: March 18, 2025

Abstract Flexible pressure sensors have emerged as indispensable components in advancing wearable electronics, healthcare systems, and next‐generation human‐machine interfaces. To enable these applications, significant progress has been made improving the sensitivity of flexible sensors. However, achieving bending insensitivity—crucial for reliable detection under dynamic curved conditions—remains a critical challenge. In this study, high‐performance capacitive sensor is presented that successfully integrates insensitivity with enhanced sensitivity. By leveraging percolation effect within sub‐100 nm nanograting structure, design optimized through numerical analysis finite element method (FEM) simulations. Fabricated using nanoscale wet‐chemical digital etching process nanoimprint lithography, features valley structure. It exhibits an exceptional 0.05 kPa⁻¹, capacitance changes 4.2 times greater than those flat substrate designs. Furthermore, nanostructured effectively reduces strain to 0.175 substrates, ensuring stable performance even at 2.5 mm radius curvature. This highly array enables real‐time mapping human artery pulse monitoring, making it suitable tactile sensing applications.

Language: Английский

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Facile Strategy for Preparing Crosstalk-Free and Stabilized Flexible Pressure Sensing Array with Inverted Micropyramids on a Substrate

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

Published: March 26, 2025

Language: Английский

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Bioinspired hydrogel tactile sensor via pressure-intensified ion signals with self-healing and anti-frozen capability

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163485 - 163485

Published: May 1, 2025

Language: Английский

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Recent advances in multimodal skin-like wearable sensors

Applied Physics Reviews, Journal Year: 2024, Volume and Issue: 11(4)

Published: Nov. 19, 2024

Wearable sensors capable of simultaneous monitoring multiple physiological markers have the potential to dramatically reduce healthcare cost through early detection diseases and accelerating rehabilitation processes. These skin-like can deliver significant benefits thanks their ability continuously track various indicators over extended periods. However, due high sensitivities soft stimuli, decoupling effects physical stimuli associated with accurately pinpointing contributions individual remains a huge challenge. This article aims provide comprehensive review recent advances in multifunctional, wearable sensors, particular emphasis on mechanisms signal transduction, microengineering designs, diverse applications both health human–machine interactions. It elaborates operational principles such as triboelectric, resistive, piezoelectric, capacitive each uniquely adept at detecting range stimuli. also examines conceptualizations methodologies for isolating specific from mix signals. Furthermore, this highlights these multimodal sensors. Finally, opportunities challenges facing are discussed, exploring intelligent systems tailored applications.

Language: Английский

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Stretchable, Rechargeable, Multimodal Hybrid Electronics for Decoupled Sensing toward Emotion Detection

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

Published: March 24, 2025

Despite the rapid development of stretchable electronic devices for various applications in biomedicine and healthcare, coupling between multiple input signals remains an obstacle multimodal sensing before use practical environments. This work introduces a fully integrated stretchable, rechargeable, hybrid device that combines decoupled sensors with flexible wireless powering transmitting module emotion recognition. Through optimized structural design material selection, can provide continuous real-time monitoring biaxial strain, temperature, humidity, heart rate, SpO2 levels. With stacked bilayer both circuit, rechargeable system showcases reduced footprint improved comfort. A neural network model is also demonstrated to allow high-precision facial expression By measured data mobile cloud, healthcare professionals evaluate psychological health emotional support through telemedicine when needed.

Language: Английский

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Coral-Inspired Capacitive Pressure Sensor with High Sensitivity and Wide Range for Human–Computer Interaction

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 31, 2024

Flexible capacitive pressure sensors have extensive applications in healthcare and human-computer interaction. However, current face challenges sensitivity, response range, batch-to-batch consistency. Herein, inspired by coral, a sensor featuring Y-shaped dielectric layer is developed, offering high sensitivity wide detection range. The innovative biomimetic ″Y-shaped coral″ gradient tilt structure skillfully combines two effects: the change contact area reduction plate spacing, to changes. This design not only expands compressible range of but also achieves good balance between Experimental results show that fabricated exhibits (1.10 kPa–1), substantial (210 kPa), minimal hysteresis (≈3%), excellent durability (withstanding over 20,000 cycles at 100 kPa). has broad application prospects interaction, intelligent devices, flexible sensing arrays, meteorological monitoring, enabling precise identification, real-time efficient support functions. Therefore, we believe this study provides approach for offers strong technological advancement innovation related fields.

Language: Английский

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Highly Sensitive and Flexible Capacitive Pressure Sensors Combined with Porous Structure and Holes Array by Sacrificial Templates and Laser Ablation

Published: Aug. 12, 2024

Flexible wearable pressure sensors offer numerous benefits, including superior sensing capabilities, a lightweight and compact design, exceptional conformal properties, making them highly sought after in various applications medical monitoring, human-computer interaction, electronic skin. Because of their excellent characteristics, such as simple fabrication, low power consumption, short response time, capacitive have received widespread attention. As flexible polymer material, polydimethylsiloxane (PDMS) is widely used the preparation dielectric layers for sensors. The Young's modulus can be effectively decreased through synergistic application sacrificial template laser ablation techniques, thereby improving functionality In this study, novel sensor was developed series processes method using NaCl microparticles, CO₂ ablation, sandwiching porous PDMS layer between two electrodes to create sensor. demonstrates sensitivity 0.694 kPa-1 within range 0-1 kPa, detect pressures ranging from 3 Pa 200 kPa. stability up 500 cycles, with rapid time 96ms recovery 118ms, coupled hysteresis 6.8%. Furthermore, our testing indicates that possesses limitless potential use detecting human physiological activities signaling emergencies.

Language: Английский

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Highly Sensitive and Flexible Capacitive Pressure Sensors Combined with Porous Structure and Hole Array Using Sacrificial Templates and Laser Ablation

Polymers, Journal Year: 2024, Volume and Issue: 16(16), P. 2369 - 2369

Published: Aug. 21, 2024

Flexible, wearable pressure sensors offer numerous benefits, including superior sensing capabilities, a lightweight and compact design, exceptional conformal properties, making them highly sought after in various applications medical monitoring, human–computer interactions, electronic skins. Because of their excellent characteristics, such as simple fabrication, low power consumption, short response time, capacitive have received widespread attention. As flexible polymer material, polydimethylsiloxane (PDMS) is widely used the preparation dielectric layers for sensors. The Young’s modulus can be effectively decreased through synergistic application sacrificial template laser ablation techniques, thereby improving functionality In this study, novel sensor was introduced. Its layer developed series processes, use method using NaCl microparticles subsequent CO2 ablation. This porous PDMS layer, featuring an array holes, then sandwiched between two electrodes to create sensor. demonstrates sensitivity 0.694 kPa−1 within range 0–1 kPa detect pressures ranging from 3 Pa 200 kPa. stability up 500 cycles, with rapid time 96 ms recovery 118 ms, coupled hysteresis 6.8%. Furthermore, our testing indicates that possesses limitless potential detecting human physiological activities delivering signals.

Language: Английский

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Directional Characteristic Enhancement of an Omnidirectional Detection Sensor Enabled by Strain Partitioning Effects in a Periodic Composite Hole Substrate

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(11), P. 5802 - 5814

Published: Oct. 21, 2024

An omnidirectional stretchable strain sensor with high resolution is a critical component for motion detection and human-machine interaction. It the current dominant solution to integrate several consistent units into based on certain geometric structure. However, excessive similarity in orientation characteristics among sensing restricts recognition due their closely matched sensitivity. In this study, partition modulation (SPM), sensitivity anisotropic amplification strategy proposed resistive sensors. The stress distribution of sensitive conductive network modulated by structural parameters customized periodic hole array introduced underneath elastomer substrate. Meanwhile, isolation structures are designed both sides unit interference immune. optimized sensors exhibit excellent (19 0-80%; 109 80%-140%; 368 140%-200%), nearly 7-fold improvement 140%-200% interval compared bare More importantly, composed multiple different configurations can highlight amplitude difference between channels reaching up 29 times. For 48-class strain-orientation decoupling task, rate sensitivity-differentiated layout lightweight deep learning as 96.01%, superior that 85.7% sensitivity-consistent layout. Furthermore, application fitness field demonstrates an accurate wrist flexion direction (98.4%) spinal bending angle (83.4%). Looking forward, methodology provides unique prospects broader applications such tactile sensors, soft robotics, health monitoring technologies.

Language: Английский

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