Simultaneously Detecting Subtle and Intensive Human Motions Based on a Silver Nanoparticles Bridged Graphene Strain Sensor

2018 ◽  
Vol 10 (4) ◽  
pp. 3948-3954 ◽  
Author(s):  
Zhen Yang ◽  
Dan-Yang Wang ◽  
Yu Pang ◽  
Yu-Xing Li ◽  
Qian Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Strain Sensor ◽  
Human Motions

A Packaged and Reusable Hydrogel Strain Sensor with Conformal Adhesion to Skin for Human Motions Monitoring

2021 ◽  
pp. 2101786
Author(s):  
Meijin Zhao ◽  
Wenshuai Zhang ◽  
Dan Wang ◽  
Peipei Sun ◽  
Yuanyuan Tao ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Human Motions

Dual‐Mode Wearable Strain Sensor Based on Graphene/Colloidal Crystal Films for Simultaneously Detection of Subtle and Large Human Motions

2020 ◽  
Vol 5 (2) ◽  
pp. 1901056 ◽  
Author(s):  
Hua Xu ◽  
Ming Kun Zhang ◽  
Yi Fei Lu ◽  
Jia Jia Li ◽  
Si Jia Ge ◽  
...  
Keyword(s):  
Colloidal Crystal ◽  
Strain Sensor ◽  
Dual Mode ◽  
Crystal Films ◽  
Human Motions

scholarly journals Ionic Conductive Organohydrogel With Ultrastretchability, Self-Healable and Freezing-Tolerant Properties for Wearable Strain Sensor

2021 ◽  
Vol 9 ◽  
Author(s):  
Feng Ji ◽  
Min Jiang ◽  
Qingyu Yu ◽  
Xuefang Hao ◽  
Yan Zhang ◽  
...  
Keyword(s):  
Large Scale ◽  
Strain Sensor ◽  
Fast Response ◽  
Self Healing ◽  
One Pot ◽  
High Mechanical Strength ◽  
Flexible Sensors ◽  
Healing Property ◽  
Human Motions ◽  
Huge Challenge

Currently, stretchable hydrogel has attracted great attention in the field of wearable flexible sensors. However, fabricating flexible hydrogel sensor simultaneously with superstretchability, high mechanical strength, remarkable self-healing ability, excellent anti-freezing and sensing features via a facile method remains a huge challenge. Herein, a fully physically linked poly(hydroxyethyl acrylamide)-gelatin-glycerol-lithium chloride (PHEAA-GE-Gl-LiCl) double network organohydrogel is prepared via a simple one-pot heating-cooling-photopolymerization method. The prepared PHEAA-GE-Gl-LiCl organohydrogel exhibits favorable stretchability (970%) and remarkable self-healing property. Meanwhile, due to the presence of glycerol and LiCl, the PHEAA-GE-Gl-LiCl organohydrogel possesses outstanding anti-freezing capability, it can maintain excellent stretchability (608%) and conductivity (0.102 S/m) even at −40°C. In addition, the PHEAA-GE-Gl-LiCl organohydrogel-based strain sensor is capable of repeatedly and stably detecting and monitoring both large-scale human motions and subtle physiological signals in a wide temperature range (from −40°C to 25°C). More importantly, the PHEAA-GE-Gl-LiCl organohydrogel-based sensor displays excellent strain sensitivity (GF = 13.16 at 500% strain), fast response time (300 ms), and outstanding repeatability. Based on these super characteristics, it is envisioned that PHEAA-GE-Gl-LiCl organohydrogel holds promising potentials as wearable strain sensor.

A transparent, stretchable, stable, self-adhesive ionogel-based strain sensor for human motion monitoring

2019 ◽  
Vol 7 (36) ◽  
pp. 11244-11250 ◽  
Author(s):  
Jingxian Sun ◽  
Yixin Yuan ◽  
Guoqiang Lu ◽  
Lingfeng Li ◽  
Xiaoqun Zhu ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Human Motion ◽  
Human Motion Monitoring ◽  
Human Motions

A multi-functional ionogel-based strain sensor was synthesized to detect various human motions.

scholarly journals Application of AgNPs/rGO Modified Nylon Fabric in Strain Sensing

2021 ◽  
Vol 2109 (1) ◽  
pp. 012017
Author(s):  
Yongqiang Yang ◽  
Yongsong Tan ◽  
Qun Wang ◽  
Yihu Shu ◽  
Qinsheng Wang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Screen Printing ◽  
Strain Sensor ◽  
Solution Concentration ◽  
Ammonia Solution ◽  
Strain Sensing ◽  
Nylon Fabric ◽  
Reduced Graphene ◽  
Different Strains

Abstract The graphene oxide slurry was printed on the pre-stretched and non-pre-stretched nylon fabric by screen printing, and immersed in silver ammonia solution of different concentrations, and then reduced to obtain silver nanoparticles/reduced graphene oxide (AgNPs/rGO) modified nylon fabric with excellent conductivity. The surface morphology of the fabric was observed, and the performances of the fabric sensor that was scraped with graphene oxide slurry between the pre-stretched and non-pre-stretched states were explored. The resistance responses of the nylon fabric finished with different concentrations of silver ammonia solution under different strains (1%, 2%, 3%, 4%, 5%, 10%, 15%, 20%) were investigated. The results showed that the nylon strain sensor was more sensitive and stable when the graphene oxide slurry was scraped in the pre-stretched state, and while the silver ammonia solution concentration was 10 mg/mL, the nylon fabric had maximum sensitivity and lowest hysteresis performance.

scholarly journals Flexible Strain Sensor Based on Carbon Black/Silver Nanoparticles Composite for Human Motion Detection

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1836 ◽  
Author(s):  
Weiyi Zhang ◽  
Qiang Liu ◽  
Peng Chen
Keyword(s):  
Silver Nanoparticles ◽  
Carbon Black ◽  
Motion Detection ◽  
Thermoplastic Polyurethane ◽  
Strain Sensor ◽  
Human Motion ◽  
Tunneling Effect ◽  
Gauge Factor ◽  
Human Motion Detection ◽  
Flexible Strain Sensor

The demand for flexible and wearable electronic devices with excellent stretchability and sensitivity is increasing, especially for human motion detection. In this work, a simple, low-cost and convenient strategy has been employed to fabricate flexible strain sensor with a composite of carbon black and silver nanoparticles as sensing materials and thermoplastic polyurethane as matrix. The strain sensors thus prepared possesses high stretchability and good sensitivity (gauge factor of 21.12 at 100% tensile strain), excellent static (almost constant resistance variation under 50% strain for 600 s) and dynamic (100 cycles) stability. Compared with bare carbon black-based strain sensor, carbon black/silver nanoparticles composite-based strain sensor shows ~18 times improvement in sensitivity at 100% strain. In addition, we discuss the sensing mechanisms using the disconnection mechanism and tunneling effect which results in high sensitivity of the strain sensor. Due to its good strain-sensing performance, the developed strain sensor is promising in detecting various degrees of human motions such as finger bending, wrist rotation and elbow flexion.

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