A Facile Strategy for Low Young's Modulus PDMS Microbeads Enhanced Flexible Capacitive Pressure Sensors

Sun, Yupeng; Tai, Huiling; Yuan, Zhen; Duan, Zaihua; Huang, Qi; Jiang, Yadong

doi:10.1002/ppsc.202100019

Cited by 19 publications

(15 citation statements)

References 38 publications

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“…This suggests that with a sufficiently complex micro-pattern design, the conductive material compensates for the contacts' saturation effect as the pressure rises, allowing for a broad linear detection range. The compressibility of the pressure sensor rises with increasing spacing because the efficient Young's modulus of the micropattern decreases at the same pressure [ 32 ]. Enhanced micropattern distortion results in a greater contact area and hence extreme susceptibility.…”

Section: Resultsmentioning

confidence: 99%

A wearable electronic based on flexible pressure sensor for running motion monitoring

Chang

2023

Discover Nano

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The flexible pressure sensor is expected to be applied in the new generation of sports wearable electronic devices. Developing flexible pressure sensors with a wide linear range and great sensitivity, however, remains a significant barrier. In this work, we propose a hybrid conductive elastomeric film oxide-based material with a concave-shape micro-patterned array (P-HCF) on the surface that sustainably shows the necessary sensing qualities. To enhance sensing range and sensitivity, one-dimensional carbon fibers and two-dimensional MXene are incorporated into the polydimethylsiloxane matrix to form a three-dimensional conductive network. Micro-patterns with a curved shape in P-HCFs can be able to linear sensitivity across the sensing range by controlling the pressure distribution inside the material. Besides, the sensitivity of P-HCF pressure sensor can reach 31.92 kPa−1, and meanwhile, the linear band of P-HCF pressure sensor can arrive at 24 Pa–720 kPa, which makes it a good choice for sports monitoring. The designed pressure sensor can be used to monitor the foot pressure during running. By analyzing the gait information during running, it can provide data support and strategy improvement for running. This new dual working mode pressure P-HCF sensor will provide a new way for the development of intelligent sports.

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Section: Resultsmentioning

confidence: 99%

A wearable electronic based on flexible pressure sensor for running motion monitoring

Chang

2023

Discover Nano

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“…(g) Stress–strain relative capacitance curves of tactile sensors under the action of 100, 200, 300, 400, and 500 kPa. (h) Comparison of the tactile device with recently studied devices in areas of sensitivity and linear sensing range performance. ,,− …”

Section: Resultsmentioning

confidence: 99%

Highly Sensitive and Wide-Range Flexible Bionic Tactile Sensors Inspired by the Octopus Sucker Structure

Guo

Hong

Liu

et al. 2022

ACS Appl. Nano Mater.

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Recently, flexible tactile sensors have been widely concerned in many fields, including healthcare monitoring devices and wearable electronics. However, the fabrication of capacitive bionic tactile sensors with a wide linear sensing range and high sensitivity is a major difficulty. A flexible bionic sensor based on the octopus sucker microstructure that improves sensing performance by constructing a biomimetic body with a good microstructure was proposed in this study. The effect of the characteristic parameters of the sensor structure on the sensitivity is studied by simulations and experiments, and the sensor structure is optimized. Experimental results demonstrate that the proposed octopus-inspired tactile sensor has a high sensitivity of 0.636 kPa −1 and a wide linear sensing range (8 Pa-500 kPa). Moreover, the tactile sensor has a rapid response time (∼40 ms), excellent repeatability, and outstanding durability (>6000 cycles), making it a reliable platform for monitoring human movements and bionic manipulator grasping objects. This study provides bionic tactile sensors with significant potential for innovative applications in future intelligent robotics and electronic skins.

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“…Polydimethylsiloxane (PDMS) is commonly used as dielectric in capacitive pressure sensors because of its good biocompatibility, flexibility, insulating properties and elasticity [14][15][16][17][18]. However, its dielectric constant and elastic modulus sometime may affect the application range of the PDMS based sensor as well as its sensitivity [19].…”

Section: Introductionmentioning

confidence: 99%

Flexible acetylene black/PDMS capacitive pressure sensor with enhanced sensitivity based on percolation principle

Sun¹,

Li²,

Lin³

et al. 2023

International Conference on Optoelectronic Materials and Devices (ICOMD 2022)

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Recent advances in soft materials have provided a great opportunity for the development of flexible electronics. This study proposed a novel capacitive pressure sensors with enhanced sensitivity by adopting the materials of acetylene black and polydimethylsiloxane (PDMS). Based on the percolation principle, spacing of conductive particles, which closely associated with sensing performance, were adjusted by controlling the concentration of filled acetylene black and its curing time with PDMS. An optimized acetylene black/PDMS capacitive pressure sensor was finally fabricated achieving a sensitivity of 0.248 kPa −1 in the range of 4-50 kPa which is nearly five times higher than that of the pure PDMS sensor. Additionally, this developed soft sensor also present a quick response time and excellent stability that may have great potential to be applied in wearable and real-time monitoring. Furthermore, this systematical investigation and optimization towards material processing techniques may provide evidence-based guidance for the improvement of soft material-based capacitive pressure sensors.

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A Facile Strategy for Low Young's Modulus PDMS Microbeads Enhanced Flexible Capacitive Pressure Sensors

Cited by 19 publications

References 38 publications

A wearable electronic based on flexible pressure sensor for running motion monitoring

A wearable electronic based on flexible pressure sensor for running motion monitoring

Highly Sensitive and Wide-Range Flexible Bionic Tactile Sensors Inspired by the Octopus Sucker Structure

Flexible acetylene black/PDMS capacitive pressure sensor with enhanced sensitivity based on percolation principle

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