Recent advances in multimodal skin-like wearable sensors

Applied Physics Reviews, Год журнала: 2024, Номер 11(4)

Опубликована: Ноя. 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.

Язык: Английский

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Advanced Morphological and Material Engineering for High‐Performance Interfacial Iontronic Pressure Sensors

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Abstract High‐performance flexible pressure sensors are crucial for applications such as wearable electronics, interactive systems, and healthcare technologies. Among these, iontronic have garnered particular attention due to their superior sensitivity, enabled by the giant capacitance variation of electric double layer (EDL) at ionic‐electronic interface under deformation. Key advancements, incorporating microstructures into ionic layers employing diverse materials, significantly improved sensor properties like accuracy, stability, response time. This review highlights advancements in EDL sensors, focusing on structural designs material engineering. These strategies tailored optimize key metrics detection limit, linearity, speed, hysteresis, transparency, wearability, selectivity, multifunctionality. fabrication techniques, including micropatterning externally assisted methods, reviewed, along with comparison guidelines selecting appropriate sensors. Emerging healthcare, environmental aerodynamic sensing, human–machine interaction, robotics, machine learning‐assisted intelligent sensing explored. Finally, this discusses challenges future directions advancing EDL‐based

Язык: Английский

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

Carbon, Год журнала: 2025, Номер unknown, С. 120105 - 120105

Опубликована: Фев. 1, 2025

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Март 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.

Язык: Английский

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

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 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.

Язык: 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, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Язык: Английский

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

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163485 - 163485

Опубликована: Май 1, 2025

Язык: 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, Год журнала: 2024, Номер 16(16), С. 2369 - 2369

Опубликована: Авг. 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.

Язык: 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

Опубликована: Авг. 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.

Язык: 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, Год журнала: 2024, Номер 9(11), С. 5802 - 5814

Опубликована: Окт. 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.

Язык: Английский

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