Mechanically Robust and Linearly Sensitive Soft Piezoresistive Pressure Sensor for a Wearable Human–Robot Interaction System

ACS Nano, Journal Year: 2024, Volume and Issue: 18(4), P. 3151 - 3160

Published: Jan. 18, 2024

Soft piezoresistive pressure sensors play an underpinning role in enabling a plethora of future Internet Things (IoT) applications such as human–robot interaction (HRI) technologies, wearable devices, and metaverse ecosystems. Despite significant attempts to enhance the performance these sensors, existing still fall short achieving high strain tolerance linearity simultaneously. Herein, we present low-cost, facile, scalable approach fabricating highly strain-tolerant linearly sensitive soft sensor. Our design utilizes thin nanocracked gold films (NC-GFs) deposited on poly(dimethylsiloxane) (PDMS) electrodes The large mismatch stress between (Au) PDMS induces formation secondary wrinkles along pyramidal-structured electrode under pressure; function protuberances enable exceptional linear sensitivity 4.2 kPa–1 over wide range. Additionally, our sensor can maintain its even after severe mechanical deformations, including repeated stretching up 30% strain, due outstanding NC-GF. sensor's impressive sensing robustness make it suitable for diverse IoT applications, demonstrated by use pulse monitoring devices systems.

Language: Английский

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Ultra-Broad Linear Range and Sensitive Flexible Piezoresistive Sensor Using Reversed Lattice Structure for Wearable Electronics

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(28), P. 34120 - 34131

Published: July 11, 2023

Flexible pressure sensors have attracted significant attention owing to their broad applicability in wearable electronics and human-machine interfaces. However, it is still challenging simultaneously achieve a sensing range high linearity. Here, we present reversed lattice structure (RLS) piezoresistive sensor obtained through layer-level engineered additive infill via conventional fused deposition modeling three-dimensional (3D) printing. The optimized RLS attained (0.03-1630 kPa) with linearity (coefficient of determination, R2 = 0.998) sensitivity (1.26 kPa-1) due the structurally enhanced compressibility spontaneous transition dominant mechanism sensor. It also exhibited great mechanical/electrical durability rapid response/recovery time (170/70 ms). This remarkable performance enables detection various human motions over spectrum, from pulse walking. Finally, electronic glove was developed analyze distribution situations, thereby demonstrating its multipurpose electronics.

Language: Английский

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Beetle‐Inspired Gradient Slant Structures for Capacitive Pressure Sensor with a Broad Linear Response Range

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 8, 2024

Abstract Flexible pressure sensors with broad linearity range and excellent sensor‐to‐sensor uniformity have attracted unprecedented attention in the electronic skins, human–machine interfaces, environmental monitoring. However, challenges including poor owing to randomness of used nanomaterials or porous structures saturated response that leads a restricted because structural stiffening been yet addressed. Herein, novel dielectric layer based on beetle‐inspired gradient slant (GSS) is proposed endow capacitive extensive uniformity. The compressibility GSS due bending deformation pillars significantly enhances sensor sensitivity. comes from compensation contact area during sequential tall low electrodes. high ascribed batch‐to‐batch consistency prepared via 3D printing‐based fabrication process. Moreover, GSS‐based present rapid response/recovery, detection limit, dynamic response, negligible hysteresis, outstanding long‐term stability. Finally, applicabilities diverse scenarios external stimuli detection, flexible perception array, smart insole system are demonstrated.

Language: Английский

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Degradable Multilayer Fabric Sensor with Wide Detection Range and High Linearity

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(43), P. 58838 - 58847

Published: Oct. 19, 2024

Integration of multiple superior features into a single flexible pressure sensor would result in devices with greater versatility and utility. To apply the device to variety scenarios solve problem accumulation e-waste environment, it is highly desirable combine degradability wide-range linearity characteristics device. Herein, we reported degradable multilayer fabric (DMF) consisting an ellipsoidal carbon nanotube (ECNT) polyvinylpyrrolidone/cellulose acetate electrospun fibers (PEF). The alternative layer-by-layer stacking ECNT PEF notably accelerates sensitivity toward pressure. optimized demonstrated 3.38 kPa-1 over wide measurement range from 0.1 500 kPa, as well great mechanical stability 2000 cycles. A good degradation performance was confirmed by both Fourier transform infrared (FTIR) characterization decomposition experiments sodium hydroxide solution. fabricated capable precepting physiological including subtle arterial pulse, dancing training, walking postures, accidental falls. This work throws light onto fundamental understanding interfacial coupling piezoresistive materials provides possibilities for design development on-demand wearable electronics.

Language: Английский

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Flexible Pressure, Humidity, and Temperature Sensors for Human Health Monitoring

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

Published: Sept. 17, 2024

Abstract The rapid advancements in artificial intelligence, micro‐nano manufacturing, and flexible electronics technology have unleashed unprecedented innovation opportunities for applying sensors healthcare, wearable devices, human–computer interaction. human body's tactile perception involves physical parameters such as pressure, temperature, humidity, all of which play an essential role maintaining health. Inspired by the sensory function skin, many bionic been developed to simulate skin's various stimuli are widely applied health monitoring. Given urgent requirements sensing performance integration field devices monitoring, here is a timely overview recent advances multi‐functional It covers fundamental components categorizes them based on different response mechanisms, including resistive, capacitive, voltage, other types. Specifically, application these area monitoring highlighted. Based this, extended dual/triple‐mode integrating temperature presented. Finally, challenges discussed.

Language: Английский

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Enhancing Self-induced Polarization of PVDF-based Triboelectric Film by P-doped g-C3N4 for Ultrasensitive Triboelectric Pressure Sensors

Nano Energy, Journal Year: 2024, Volume and Issue: 131, P. 110207 - 110207

Published: Sept. 6, 2024

Language: Английский

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A Comprehensive Review on Fabrication and Structural Design of Polymer Composites for Wearable Pressure Sensors

Polymer science & technology., Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

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Highly Sensitive Fiber Pressure Sensors over a Wide Pressure Range Enabled by Resistive-Capacitive Hybrid Response

ACS Nano, Journal Year: 2023, Volume and Issue: 17(15), P. 14904 - 14915

Published: July 27, 2023

Soft capacitive pressure sensors with high performance are becoming increasingly in demand the emerging flexible wearable field. While fiber have achieved sensitivity, their sensitivity range is limited to low-pressure levels. As typically require preloading and fixation, this narrow of poses a challenge for practical applications. To overcome limitation, study proposes resistive-capacitive hybrid response (HFPSs) three-layer core–sheath structures. The trigger enhancement mechanisms determined through model analysis experimental verification. By adjustment response, attenuation HFPSs alleviated significantly. obtained results demonstrate that excellent characteristics such as fast low hysteresis, wide frequency, small signal drift, good durability. enhances various With enhanced can effectively monitor pulse signals at preloads ranging from 0 22.7 kPa. This improves fault tolerance monitoring expands potential application scenarios sensors.

Language: Английский

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A cross-scale honeycomb architecture-based flexible piezoresistive sensor for multiscale pressure perception and fine-grained identification

Materials Horizons, Journal Year: 2023, Volume and Issue: 11(2), P. 510 - 518

Published: Nov. 10, 2023

A cross-scale honeycomb architecture (CHA) consisting of a microscale tip and macroscale base is proposed to achieve trade-off between sensitivity the pressure sensing range for flexible sensors.

Language: Английский

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Bioinspired Low Hysteresis Flexible Pressure Sensor Using Nanocomposites of Multiwalled Carbon Nanotubes, Silicone Rubber, and Carbon Nanofiber for Human–Computer Interaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(13), P. 15626 - 15639

Published: June 28, 2024

The development and utilization of flexible piezoresistive sensors based on bionic nanomaterials have garnered considerable attention due to their broad potential in various domains. However, the key enhanced performance lies incorporating microstructures conductive coatings, which maximize initial resistance minimize upon pressure application, thereby amplifying change signal. In this study, we draw inspiration from microconvex structure observed skin crocodiles propose a bionic-structured sensor. sensor is fabricated using nanocomposites comprising multiwalled carbon nanotubes, silicone rubber, nanofiber conjunction with three-dimensional (3D)-printed structural mold. Sensor similar sandwich three layers: substrate layer, sensing an interdigital electrode layer. Our exhibits improved pressure-sensing capabilities, characterized by rapid response recovery times (25 ms), wide detection range (0–80 kPa), minimal hysteresis (2.44%), high sensitivity (0.4311 kPa–1 within 0–10 kPa range), fine stability (withstanding 6000 cycles under varying pressures). Notably, has efficient ability, long-term stability, good waterproofing properties, expanding its applications human–computer interaction, motion monitoring, intelligent robotics, underwater rescue operations.

Language: Английский

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