Wearable Pressure Sensors for Pulse Wave Monitoring

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: Jan. 19, 2022

Abstract Cardiovascular diseases remain the leading cause of death worldwide. The rapid development flexible sensing technologies and wearable pressure sensors have attracted keen research interest been widely used for long‐term real‐time cardiovascular status monitoring. Owing to compelling characteristics, including light weight, wearing comfort, high sensitivity pulse pressures, physiological waveforms can be precisely continuously monitored by health Herein, an overview human wave monitoring is presented, with a focus on transduction mechanism, microengineering structures, related applications in condition assessment. conceptualizations methods acquisition pathological information system are outlined. biomechanics arterial waves working mechanism various sensors, triboelectric, piezoelectric, magnetoelastic, piezoresistive, capacitive, optical also subject systematic debate. Exemple measurement based structured devices then summarized. Finally, discussion opportunities challenges that face, as well their potential intelligent personalized healthcare given conclusion.

Language: Английский

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Wearable Triboelectric Sensors Enabled Gait Analysis and Waist Motion Capture for IoT‐Based Smart Healthcare Applications

Advanced Science, Journal Year: 2021, Volume and Issue: 9(4)

Published: Nov. 19, 2021

Gait and waist motions always contain massive personnel information it is feasible to extract these data via wearable electronics for identification healthcare based on the Internet of Things (IoT). There also remains a demand develop cost-effective human-machine interface enhance immersion during long-term rehabilitation. Meanwhile, triboelectric nanogenerator (TENG) revealing its merits in both IoT tends be possible solution. Herein, authors present TENG-based devices gait analysis motion capture intelligence performance lower-limb Four sensors are equidistantly sewed onto fabric belt recognize motion, enabling real-time robotic manipulation virtual game immersion-enhanced training. The insole equipped with two TENG designed walking status detection 98.4% accuracy five different humans aiming at rehabilitation plan selection achieved by leveraging machine learning technology further analyze signals. Through robot, demonstrate that sensory system performs well user recognition, monitoring, as robot gaming-aided training, showing potential IoT-based smart applications.

Language: Английский

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Piezoelectric nanogenerators for personalized healthcare

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(9), P. 3380 - 3435

Published: Jan. 1, 2022

Piezoelectric nanogenerators are becoming a compelling bioelectronics platform technology for human-associated energy harvesting, self-powered sensing, and therapeutics, which will largely contribute to the medical field in era of Internet things.

Language: Английский

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High-performance piezoelectric composites via β phase programming

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Aug. 18, 2022

Polymer-ceramic piezoelectric composites, combining high piezoelectricity and mechanical flexibility, have attracted increasing interest in both academia industry. However, their activity is largely limited by intrinsically low crystallinity weak spontaneous polarization. Here, we propose a Ti3C2Tx MXene anchoring method to manipulate the intermolecular interactions within all-trans conformation of polymer matrix. Employing phase-field simulation molecular dynamics calculations, show that OH surface terminations on nanosheets offer hydrogen bonding with fluoropolymer matrix, leading dipole alignment enhanced net polarization polymer-ceramic composites. We then translated this interfacial strategy into electrospinning boost response samarium doped Pb (Mg1/3Nb2/3)O3-PbTiO3/polyvinylidene fluoride composite nanofibers 160% via inclusion. With excellent attributes, as-electrospun can be easily integrated conventional shoe insoles form foot sensor network for all-around gait patterns monitoring, walking habits identification Metatarsalgi prognosis. This work utilizes coupling mechanism as develop high-performance composites wearable electronics.

Language: Английский

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Recent Advances in Triboelectric Nanogenerators: From Technological Progress to Commercial Applications

ACS Nano, Journal Year: 2023, Volume and Issue: 17(12), P. 11087 - 11219

Published: May 23, 2023

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions save our environment, renewable energy harvesting technologies will serve as a key solution near future. Among them, triboelectric nanogenerators (TENGs), which is one of most promising mechanical harvesters by means contact electrification phenomenon, explosively developing due abundant wasting sources number superior advantages wide availability selection materials, relatively simple device configurations, low-cost processing. Significant experimental theoretical efforts have been achieved toward understanding fundamental behaviors range demonstrations since its report 2012. As result, considerable technological advancement has exhibited it advances timeline achievement proposed roadmap. Now, technology reached stage prototype development with verification performance beyond lab scale environment commercialization. this review, distinguished authors world worked together summarize state art theory, devices, systems, circuits, applications TENG fields. The great research achievements researchers field around over past decade expected play major role coming fruition unexpectedly accelerated next decade.

Language: Английский

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Multifunctional Flexible Humidity Sensor Systems Towards Noncontact Wearable Electronics

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: July 22, 2022

In the past decade, global industry and research attentions on intelligent skin-like electronics have boosted their applications in diverse fields including human healthcare, Internet of Things, human-machine interfaces, artificial intelligence soft robotics. Among them, flexible humidity sensors play a vital role noncontact measurements relying unique property rapid response to change. This work presents an overview recent advances using various active functional materials for contactless monitoring. Four categories are highlighted based resistive, capacitive, impedance-type voltage-type working mechanisms. Furthermore, typical strategies chemical doping, structural design Joule heating introduced enhance performance sensors. Drawing perception capability, human/plant healthcare management, interactions as well integrated sensor-based feedback systems presented. The burgeoning innovations this field will benefit society, especially during COVID-19 epidemic, where cross-infection should be averted sensation is highly desired.

Language: Английский

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Helical Fiber Strain Sensors Based on Triboelectric Nanogenerators for Self-Powered Human Respiratory Monitoring

ACS Nano, Journal Year: 2022, Volume and Issue: 16(2), P. 2811 - 2821

Published: Jan. 31, 2022

Respiration is a major vital sign, which can be used for early illness diagnosis and physiological monitoring. Wearable respiratory sensors present an exciting opportunity to monitor human behaviors in real-time, noninvasive, comfortable way. Among them, fiber-shaped triboelectric nanogenerators (FS-TENGs) are attractive their comfort high degree of freedom. However, the single-electrode FS-TENGs cannot respond own tensile strains, coaxial double-electrode show low sensitivity strain due structural limitations. Here, type helical fiber sensor (HFSS) developed, tiny strains. In addition, smart wearable real-time monitoring system developed based on HFSSs, measure some key breathing parameters disease prevention medical diagnosis. An intelligent alarm automatically call preset mobile phone help response behavior changes. This work provides effective structure fabricating highly sensitive develops self-powered systems.

Language: Английский

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Sensing–transducing coupled piezoelectric textiles for self-powered humidity detection and wearable biomonitoring

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(3), P. 842 - 851

Published: Jan. 1, 2023

The performance of chemical sensors is dominated by the perception target molecules via sensitive materials and conduction sensing signals through transducers. However, transduction are spatially temporally independent in most sensors, which poses a challenge for device miniaturization integration. Herein, we proposed sensing-transducing coupled strategy embedding high piezoresponse Sm-PMN-PT ceramic (d33 = ∼1500 pC N-1) into moisture-sensitive polyetherimide (PEI) polymer matrix electrospinning to conjugate humidity signal synchronously sympatrically. Through phase-field simulation experimental characterization, reveal principle design composition topological structure piezoelectric (STP) textiles order modulate recognition, conversion, component utilization ratio prepared active achieving sensitivity (0.9%/RH%) fast response (20 s) toward ambient moisture. STP textile can be worn on human body realize emotion exercise status monitoring, physiological stress identification. This work offers unprecedented insights coupling mechanism between chemisorption-related interfacial state energy conversion efficiency opens up new paradigm developing autonomous, multifunctional highly flexible sensors.

Language: Английский

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Humidity-sensitive chemoelectric flexible sensors based on metal-air redox reaction for health management

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Sept. 15, 2022

Numerous studies have shown flexible electronics play important roles in health management. The way of power supply is always an essential factor devices and self-powered ones are very attractive because the fabrication easiness, usage comfort aesthetics system. In this work, based on metal-air redox reaction, which usually used designing batteries, we design a chemoelectric humidity sensor where silk fibroin (SF) LiBr gel matrix containing parallel aligned graphene oxide (GO) flakes serve as electrolyte. abundant hydrophilic groups GO/SF hygroscopicity lead to tight dependence output current humidity, enabling high sensitivity (0.09 μA/s/1%), fast response (1.05 s) quick recovery (0.80 s). As proofs concept, all-in-one respiratory monitoring-diagnosing-treatment system non-contact human-machine interface, demonstrating applications

Language: Английский

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Integrated core-shell structured smart textiles for active NO2 concentration and pressure monitoring

Nano Energy, Journal Year: 2023, Volume and Issue: 116, P. 108788 - 108788

Published: Aug. 15, 2023

Language: Английский

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