High‐Performance Flexible Pressure Sensor Based on Controllable Hierarchical Microstructures by Laser Scribing for Wearable Electronics

High-performance pressure sensors have attracted considerable attention recently due to their promising applications in touch displays, wearable electronics, human–machine interfaces, and real-time physiological signal perception.

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Highly Sensitive Capacitive Flexible Pressure Sensor Based on a High-Permittivity MXene Nanocomposite and 3D Network Electrode for Wearable Electronics

ACS Sensors ◽

10.1021/acssensors.1c00484 ◽

2021 ◽

Author(s):

Long Zhang ◽

Shaohui Zhang ◽

Chao Wang ◽

Quan Zhou ◽

Haifeng Zhang ◽

...

Keyword(s):

Pressure Sensor ◽

Wearable Electronics ◽

High Permittivity ◽

3D Network ◽

Highly Sensitive ◽

Flexible Pressure Sensor

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Nano Carbon Black-Based High Performance Wearable Pressure Sensors

Nanomaterials ◽

10.3390/nano10040664 ◽

2020 ◽

Vol 10 (4) ◽

pp. 664 ◽

Cited By ~ 2

Author(s):

Junsong Hu ◽

Junsheng Yu ◽

Ying Li ◽

Xiaoqing Liao ◽

Xingwu Yan ◽

...

Keyword(s):

Carbon Black ◽

Pressure Sensor ◽

High Performance ◽

Large Scale ◽

Pressure Sensors ◽

High Sensitivity ◽

Wearable Electronics ◽

Atmospheric Pollutant ◽

Piezoresistive Pressure Sensor ◽

Nano Carbon

The reasonable design pattern of flexible pressure sensors with excellent performance and prominent features including high sensitivity and a relatively wide workable linear range has attracted significant attention owing to their potential application in the advanced wearable electronics and artificial intelligence fields. Herein, nano carbon black from kerosene soot, an atmospheric pollutant generated during the insufficient burning of hydrocarbon fuels, was utilized as the conductive material with a bottom interdigitated textile electrode screen printed using silver paste to construct a piezoresistive pressure sensor with prominent performance. Owing to the distinct loose porous structure, the lumpy surface roughness of the fabric electrodes, and the softness of polydimethylsiloxane, the piezoresistive pressure sensor exhibited superior detection performance, including high sensitivity (31.63 kPa−1 within the range of 0–2 kPa), a relatively large feasible range (0–15 kPa), a low detection limit (2.26 pa), and a rapid response time (15 ms). Thus, these sensors act as outstanding candidates for detecting the human physiological signal and large-scale limb movement, showing their broad range of application prospects in the advanced wearable electronics field.

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High-sensitivity, fast-response flexible pressure sensor for electronic skin using direct writing printing

RSC Advances ◽

10.1039/d0ra04431h ◽

2020 ◽

Vol 10 (44) ◽

pp. 26188-26196 ◽

Cited By ~ 2

Author(s):

Xiaojun Chen ◽

Xitong Lin ◽

Deyun Mo ◽

Xiaoqun Xia ◽

Manfeng Gong ◽

...

Keyword(s):

Human Computer Interaction ◽

Pressure Sensor ◽

High Sensitivity ◽

Fast Response ◽

Wearable Electronics ◽

Direct Writing ◽

Electronic Skin ◽

Medical Health ◽

Flexible Pressure Sensor ◽

Health Diagnosis

Bionic electronic skin with human sensory capabilities has attracted extensive research interest, which has been applied in the fields of medical health diagnosis, wearable electronics, human–computer interaction, and bionic prosthetics.

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High-Sensitivity Flexible Pressure Sensor-Based 3D CNTs Sponge for Human–Computer Interaction

Polymers ◽

10.3390/polym13203465 ◽

2021 ◽

Vol 13 (20) ◽

pp. 3465

Author(s):

Jianli Cui ◽

Xueli Nan ◽

Guirong Shao ◽

Huixia Sun

Keyword(s):

Pressure Sensor ◽

High Performance ◽

Large Scale ◽

Low Cost ◽

Pressure Sensors ◽

Chemical Vapor ◽

High Sensitivity ◽

Wearable Electronics ◽

Wide Range ◽

Flexible Pressure Sensors

Researchers are showing an increasing interest in high-performance flexible pressure sensors owing to their potential uses in wearable electronics, bionic skin, and human–machine interactions, etc. However, the vast majority of these flexible pressure sensors require extensive nano-architectural design, which both complicates their manufacturing and is time-consuming. Thus, a low-cost technology which can be applied on a large scale is highly desirable for the manufacture of flexible pressure-sensitive materials that have a high sensitivity over a wide range of pressures. This work is based on the use of a three-dimensional elastic porous carbon nanotubes (CNTs) sponge as the conductive layer to fabricate a novel flexible piezoresistive sensor. The synthesis of a CNTs sponge was achieved by chemical vapor deposition, the basic underlying principle governing the sensing behavior of the CNTs sponge-based pressure sensor and was illustrated by employing in situ scanning electron microscopy. The CNTs sponge-based sensor has a quick response time of ~105 ms, a high sensitivity extending across a broad pressure range (less than 10 kPa for 809 kPa−1) and possesses an outstanding permanence over 4,000 cycles. Furthermore, a 16-pixel wireless sensor system was designed and a series of applications have been demonstrated. Its potential applications in the visualizing pressure distribution and an example of human–machine communication were also demonstrated.

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High-Performance Paper-Based Capacitive Flexible Pressure Sensor and Its Application in Human-Related Measurement

Nanoscale Research Letters ◽

10.1186/s11671-019-3014-y ◽

2019 ◽

Vol 14 (1) ◽

Cited By ~ 11

Author(s):

Weizhi Li ◽

Li Xiong ◽

Yueming Pu ◽

Yong Quan ◽

Shibin Li

Keyword(s):

Pressure Sensor ◽

High Performance ◽

Flexible Pressure Sensor

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Highly sensitive flexible pressure sensor based on microstructured PDMS for wearable electronics application

2017 18th International Conference on Electronic Packaging Technology (ICEPT) ◽

10.1109/icept.2017.8046579 ◽

2017 ◽

Cited By ~ 1

Author(s):

Yuan Zhang ◽

Yougen Hu ◽

Tao Zhao ◽

Pengli Zhu ◽

Rong Sun ◽

...

Keyword(s):

Pressure Sensor ◽

Wearable Electronics ◽

Highly Sensitive ◽

Flexible Pressure Sensor

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Microdome-Tunable Graphene/Carbon Nanotubes Pressure Sensors Based on Polystyrene Array for Wearable Electronics

Materials ◽

10.3390/ma14237385 ◽

2021 ◽

Vol 14 (23) ◽

pp. 7385

Author(s):

Xingjie Su ◽

Chunli Luo ◽

Weiguo Yan ◽

Junyi Jiao ◽

Dongzhou Zhong

Keyword(s):

Carbon Nanotubes ◽

Pressure Sensor ◽

Self Assembly ◽

Low Cost ◽

Pressure Sensors ◽

Conductive Filler ◽

Human Motion ◽

Wearable Electronics ◽

Flexible Pressure Sensor ◽

Human Finger

Resistive pressure sensors are appealing due to having several advantages, such as simple reading mechanisms, simple construction, and quick dynamic response. Achieving a constantly changeable microstructure of sensing materials is critical for the flexible pressure sensor and remains a difficulty. Herein, a flexible, tunable resistive pressure sensors is developed via simple, low-cost microsphere self-assembly and graphene/carbon nanotubes (CNTs) solution drop coating. The sensor uses polystyrene (PS) microspheres to construct an interlocked dome microstructure with graphene/CNTs as a conductive filler. The results indicate that the interlocked microdome-type pressure sensor has better sensitivity than the single microdome-type and single planar-type without surface microstructure. The pressure sensor’s sensitivity can be adjusted by varying the diameter of PS microspheres. In addition, the resistance of the sensor is also tunable by adjusting the number of graphene/CNT conductive coating layers. The developed flexible pressure sensor effectively detected human finger bending, demonstrating tremendous potential in human motion monitoring.

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