A plantar wearable pressure sensor based on hybrid lead zirconate-titanate/microfibrillated cellulose piezoelectric composite films for human health monitoring

Guan, Yanfang; Bai, Mingyang; Li, Qiuliang; Li, Wujie; Li, Guangyu; Liu, Chunbo; Chen, Yu; Lin, Yang; Hui, Yanbo; Wei, Ronghan

doi:10.1039/d2lc00051b

Cited by 21 publications

(9 citation statements)

References 65 publications

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“…Flexible pressure sensors can convert external pressure changes into electrical signals, and they are widely used in various fields such as medical healthcare monitoring devices, medical diagnostic tools, human–machine interaction, and wearable electronic devices. − Pressure sensors can generally be divided into four types: piezoelectric, − friction, − capacitive, − and resistive. − Among them, resistive pressure sensors can convert pressure into resistance signals and are considered promising candidates due to their simplicity, low cost, and fast response time. Optimizing the pressure sensing capability of resistive sensors has always been a hot research topic.…”

Section: Introductionmentioning

confidence: 99%

Variable Stiffness Flexible Wearable Pressure Sensors with Dual-Mode Switching Sensitivity and Working Pressure Range

Jia,

Zhu,

et al. 2024

ACS Appl. Electron. Mater.

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The dilemma between sensitivity and the working pressure range in flexible pressure sensors restricts their general applicability. Herein the phase-change materials were introduced into carbon nanotube/polyurethane (CNT/PU) composites to create switchable dual-mechanical-mode membranes (SDMs). The developed SDMs pressure sensor can be switched between rigid and soft working modes. The soft mode exhibits an approximately 13.3 times improvement in sensitivity compared with the rigid mode, while the rigid mode offers a roughly 64% increase in the working pressure range compared to the soft mode. The SDMs pressure sensor shows excellent cyclic stability and an applicable response/recovery time. This soft/rigid dual-mode SDMs sensor has been successfully applied for sensing both small and large pressures, which paves an avenue for balancing sensitivity and the working pressure range in various scenarios.

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Section: Introductionmentioning

confidence: 99%

Variable Stiffness Flexible Wearable Pressure Sensors with Dual-Mode Switching Sensitivity and Working Pressure Range

Jia,

Zhu,

et al. 2024

ACS Appl. Electron. Mater.

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“…With the development of health-monitoring applications, flexible sensors are being required in growing number [ 1 ]. The existing flexible tactile sensors can be divided according to their working mechanism, including piezoresistive [ 2 , 3 ], capacitive [ 4 , 5 , 6 , 7 , 8 ], triboelectric [ 9 , 10 ], and piezoelectric [ 11 , 12 , 13 , 14 , 15 ] sensors. Among these sensors, capacitive sensors with a dielectric layer sandwiched between two electrodes exhibit the advantages of a simple structure, facile manufacturing, low energy consumption, and static/dynamic detection.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

Zhao

Han

et al. 2023

Nanomaterials

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Many practical applications require flexible high-sensitivity pressure sensors. However, such sensors are difficult to achieve using conventional materials. Engineering the morphology of the electrodes and the topography of the dielectrics has been demonstrated to be effective in boosting the sensing performance of capacitive pressure sensors. In this study, a flexible capacitive pressure sensor with high sensitivity was fabricated by using three-dimensional vertical graphene (VG) as the electrode and micro-pyramidal polydimethylsiloxane (PDMS) as the dielectric layer. The engineering of the VG morphology, size, and interval of the micro-pyramids in the PDMS dielectric layer significantly boosted the sensor sensitivity. As a result, the sensors demonstrated an exceptional sensitivity of up to 6.04 kPa−1 in the pressure range of 0–1 kPa, and 0.69 kPa−1 under 1–10 kPa. Finite element analysis revealed that the micro-pyramid structure in the dielectric layer generated a significant deformation effect under pressure, thereby ameliorating the sensing properties. Finally, the sensor was used to monitor finger joint movement, knee motion, facial expression, and pressure distribution. The results indicate that the sensor exhibits great potential in various applications, including human motion detection and human-machine interaction.

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“…With the increase in demand for wearable technology, flexible pressure sensors have been extensively studied owing to their broad applicability in wearable electronics, , E-skin, , healthcare monitoring, − and human–machine interfaces. − Piezoresistive-type flexible pressure sensors have attracted considerable attention owing to their significant potential based on their simple mechanism, low energy consumption, facile fabrication, and easy measurement compared with other types of pressure sensors (e.g., capacitive, − piezoelectric, − and triboelectric − sensors). However, most piezoresistive sensors have limitations based on material properties, such as a narrow sensing range, poor linearity, and low sensitivity.…”

Section: Introductionmentioning

confidence: 99%

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

Bang

Chun

Lim

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible pressure sensors have attracted significant attention owing to their broad applicability in wearable electronics and human–machine interfaces. However, it is still challenging to simultaneously achieve a broad sensing range and high linearity. Here, we present a reversed lattice structure (RLS) piezoresistive sensor obtained through a layer-level engineered additive infill structure via conventional fused deposition modeling three-dimensional (3D) printing. The optimized RLS piezoresistive sensor attained a pressure sensing range (0.03–1630 kPa) with high linearity (coefficient of determination, R 2 = 0.998) and sensitivity (1.26 kPa–1) due to the structurally enhanced compressibility and spontaneous transition of dominant sensing mechanism of the sensor. It also exhibited great mechanical/electrical durability and a rapid response/recovery time (170/70 ms). This remarkable performance enables the detection of various human motions over a broad spectrum, from pulse detection to human walking. Finally, a wearable electronic glove was developed to analyze the pressure distribution in various situations, thereby demonstrating its applicability in multipurpose wearable electronics.

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A plantar wearable pressure sensor based on hybrid lead zirconate-titanate/microfibrillated cellulose piezoelectric composite films for human health monitoring

Abstract: Flexible and wearable electronic sensors hold great promise for improving the quality of life especially in the field of healthcare monitoring thanks to their low cost, flexibility, high electromechanical coupling...

Cited by 21 publications

References 65 publications

Variable Stiffness Flexible Wearable Pressure Sensors with Dual-Mode Switching Sensitivity and Working Pressure Range

Variable Stiffness Flexible Wearable Pressure Sensors with Dual-Mode Switching Sensitivity and Working Pressure Range

Highly Sensitive and Flexible Capacitive Pressure Sensors Based on Vertical Graphene and Micro-Pyramidal Dielectric Layer

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

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