Highly Sensitive, Flexible, and Wearable Pressure Sensor Based on a Giant Piezocapacitive Effect of Three-Dimensional Microporous Elastomeric Dielectric Layer

2016 ◽  
Vol 8 (26) ◽  
pp. 16922-16931 ◽  
Author(s):  
Donguk Kwon ◽  
Tae-Ik Lee ◽  
Jongmin Shim ◽  
Seunghwa Ryu ◽  
Min Seong Kim ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Dielectric Layer ◽  
Three Dimensional ◽  
Highly Sensitive

scholarly journals A flexible and highly sensitive pressure sensor based on three-dimensional electrospun carbon nanofibers

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 13898-13905
Author(s):  
Chuan Cai ◽  
He Gong ◽  
Weiping Li ◽  
Feng Gao ◽  
Qiushi Jiang ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Pressure Sensor ◽  
Carbon Nanofiber ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Highly Sensitive ◽  
Sensitive Pressure

A three-dimensional electrospun carbon nanofiber network was used to measure press strains with high sensitivity.

scholarly journals A Highly Sensitive and Flexible Capacitive Pressure Sensor Based on a Porous Three-Dimensional PDMS/Microsphere Composite

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1412 ◽  
Author(s):  
Young Jung ◽  
Wookjin Lee ◽  
Kyungkuk Jung ◽  
Byunggeon Park ◽  
Jinhyoung Park ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Sacrificial Layer ◽  
Three Dimensional ◽  
Pressure Sensors ◽  
Capacitive Pressure Sensor ◽  
Mechanical Stimuli ◽  
Highly Sensitive ◽  
Flexible Pressure Sensors ◽  
Fast Rise ◽  
Better Than

In recent times, polymer-based flexible pressure sensors have been attracting a lot of attention because of their various applications. A highly sensitive and flexible sensor is suggested, capable of being attached to the human body, based on a three-dimensional dielectric elastomeric structure of polydimethylsiloxane (PDMS) and microsphere composite. This sensor has maximal porosity due to macropores created by sacrificial layer grains and micropores generated by microspheres pre-mixed with PDMS, allowing it to operate at a wider pressure range (~150 kPa) while maintaining a sensitivity (of 0.124 kPa−1 in a range of 0~15 kPa) better than in previous studies. The maximized pores can cause deformation in the structure, allowing for the detection of small changes in pressure. In addition to exhibiting a fast rise time (~167 ms) and fall time (~117 ms), as well as excellent reproducibility, the fabricated pressure sensor exhibits reliability in its response to repeated mechanical stimuli (2.5 kPa, 1000 cycles). As an application, we develop a wearable device for monitoring repeated tiny motions, such as the pulse on the human neck and swallowing at the Adam’s apple. This sensory device is also used to detect movements in the index finger and to monitor an insole system in real-time.

A highly sensitive and flexible capacitive pressure sensor based on a micro-arrayed polydimethylsiloxane dielectric layer

2018 ◽  
Vol 6 (48) ◽  
pp. 13232-13240 ◽  
Author(s):  
Longquan Ma ◽  
Xingtian Shuai ◽  
Yougen Hu ◽  
Xianwen Liang ◽  
Pengli Zhu ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Dielectric Layer ◽  
Sandwich Structure ◽  
High Sensitivity ◽  
Capacitive Pressure Sensor ◽  
Pdms Substrate ◽  
Highly Sensitive ◽  
Flexible Pressure Sensor

A flexible pressure sensor with high sensitivity has been proposed which consists of a typical sandwich structure by integrating a PDMS substrate with a micro-arrayed PDMS dielectric layer.

scholarly journals Highly Sensitive, Breathable, and Flexible Pressure Sensor Based on Electrospun Membrane with Assistance of AgNW/TPU as Composite Dielectric Layer

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2459 ◽  
Author(s):  
Jie Wang ◽  
Yaoyuan Lou ◽  
Bin Wang ◽  
Qing Sun ◽  
Mingwei Zhou ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Dielectric Layer ◽  
Silver Nanowires ◽  
Synergistic Effects ◽  
Pressure Sensors ◽  
Mechanical Deformation ◽  
Wearable Devices ◽  
Electrospun Membrane ◽  
Highly Sensitive ◽  
Flexible Pressure Sensor

Pressure sensors have been widely used in electronic wearable devices and medical devices to detect tiny physical movements and mechanical deformation. However, it remains a challenge to fabricate desirable, comfortable wearing, and highly sensitive as well as fast responsive sensors to capture human body physiological signs. Here, a new capacitive flexible pressure sensor that is likely to solve this problem was constructed using thermoplastic polyurethane elastomer rubber (TPU) electrospinning nanofiber membranes as a stretchable substrate with the incorporation of silver nanowires (AgNWs) to build a composite dielectric layer. In addition, carbon nanotubes (CNTs) were painted on the TPU membranes as flexible electrodes by screen printing to maintain the flexibility and breathability of the sensors. The flexible pressure sensor could detect tiny body signs; fairly small physical presses and mechanical deformation based on the variation in capacitance due to the synergistic effects of microstructure and easily altered composite permittivity of AgNW/TPU composite dielectric layers. The resultant sensors exhibited high sensitivity (7.24 kPa−1 within the range of 9.0 × 10−3 ~ 0.98 kPa), low detection limit (9.24 Pa), and remarkable breathability as well as fast responsiveness (<55 ms). Moreover, both continuously pressing/releasing cycle over 1000 s and bending over 1000 times did not impair the sensitivity, stability, and durability of this flexible pressure sensor. This proposed strategy combining the elastomer nanofiber membrane and AgNW dopant demonstrates a cost-effective and scalable fabrication of capacitive pressure sensors as a promising application in electronic skins and wearable devices.

Highly sensitive flexible pressure sensor based on ionic dielectric layer with hierarchical ridge microstructure

2020 ◽  
Vol 313 ◽  
pp. 112218
Author(s):  
Qiang Zou ◽  
Zhiming Lei ◽  
Tao Xue ◽  
Shihao Li ◽  
Zhuomin Ma ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Dielectric Layer ◽  
Highly Sensitive ◽  
Flexible Pressure Sensor

Three-dimensional and ultralight sponges with tunable conductivity assembled from electrospun nanofibers for a highly sensitive tactile pressure sensor

2017 ◽  
Vol 5 (39) ◽  
pp. 10288-10294 ◽  
Author(s):  
Tao Xu ◽  
Yichun Ding ◽  
Zhao Wang ◽  
Yong Zhao ◽  
Weidong Wu ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Three Dimensional ◽  
Electrospun Nanofibers ◽  
Highly Sensitive

A three-dimensional conductive sponge made of electrospun nanofibers can be used in the design of a highly sensitive tactile pressure sensor.

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