Multilevel Microstructured Flexible Pressure Sensors with Ultrahigh Sensitivity and Ultrawide Pressure Range for Versatile Electronic Skins

Small ◽  
2019 ◽  
Vol 15 (10) ◽  
pp. 1804559 ◽  
Author(s):  
Xing Tang ◽  
Congyi Wu ◽  
Lin Gan ◽  
Tian Zhang ◽  
Tingting Zhou ◽  
...  
Keyword(s):  
Pressure Range ◽  
Pressure Sensors ◽  
Ultrahigh Sensitivity ◽  
Flexible Pressure Sensors

scholarly journals Highly Sensitive Pseudocapacitive Iontronic Pressure Sensor with Broad Sensing Range

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Libo Gao ◽  
Meng Wang ◽  
Weidong Wang ◽  
Hongcheng Xu ◽  
Yuejiao Wang ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Limit Of Detection ◽  
Pressure Sensors ◽  
List Type ◽  
Practical Application ◽  
Flexible Robot ◽  
Sensing Range ◽  
Physical Activity Monitoring ◽  
Ultrahigh Sensitivity ◽  
Flexible Pressure Sensors

Highlights The iontronic pressure sensor achieved an ultrahigh sensitivity (Smin > 200 kPa−1, Smax > 45,000 kPa−1). The iontronic pressure sensor exhibited a broad sensing range of over 1.4 MPa. Pseudocapacitive iontronic pressure sensor using MXene was proposed. ABSTRACT Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and robotics. Simultaneously, improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge, which hinders the devices’ practical application. Targeting this obstacle, we developed a Ti3C2Tx-derived iontronic pressure sensor (TIPS) by taking the advantages of the high intercalation pseudocapacitance under high pressure and rationally designed structural configuration. TIPS achieved an ultrahigh sensitivity (Smin > 200 kPa−1, Smax > 45,000 kPa−1) in a broad sensing range of over 1.4 MPa and low limit of detection of 20 Pa as well as stable long-term working durability for 10,000 cycles. The practical application of TIPS in physical activity monitoring and flexible robot manifested its versatile potential. This study provides a demonstration for exploring pseudocapacitive materials for building flexible iontronic sensors with ultrahigh sensitivity and sensing range to advance the development of high-performance wearable electronics.

scholarly journals Influence of the Porosity of Polymer Foams on the Performances of Capacitive Flexible Pressure Sensors

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 1968 ◽  
Author(s):  
Sylvie Bilent ◽  
Thi Hong Nhung Dinh ◽  
Emile Martincic ◽  
Pierre-Yves Joubert
Keyword(s):  
Experimental Data ◽  
Linear Model ◽  
Dielectric Material ◽  
Pressure Sensors ◽  
Volume Ratio ◽  
Measurement Range ◽  
Polymer Foams ◽  
First Order ◽  
Non Linear ◽  
Flexible Pressure Sensors

This paper reports on the study of microporous polydimethylsiloxane (PDMS) foams as a highly deformable dielectric material used in the composition of flexible capacitive pressure sensors dedicated to wearable use. A fabrication process allowing the porosity of the foams to be adjusted was proposed and the fabricated foams were characterized. Then, elementary capacitive pressure sensors (15 × 15 mm2 square shaped electrodes) were elaborated with fabricated foams (5 mm or 10 mm thick) and were electromechanically characterized. Since the sensor responses under load are strongly non-linear, a behavioral non-linear model (first order exponential) was proposed, adjusted to the experimental data, and used to objectively estimate the sensor performances in terms of sensitivity and measurement range. The main conclusions of this study are that the porosity of the PDMS foams can be adjusted through the sugar:PDMS volume ratio and the size of sugar crystals used to fabricate the foams. Additionally, the porosity of the foams significantly modified the sensor performances. Indeed, compared to bulk PDMS sensors of the same size, the sensitivity of porous PDMS sensors could be multiplied by a factor up to 100 (the sensitivity is 0.14 %.kPa−1 for a bulk PDMS sensor and up to 13.7 %.kPa−1 for a porous PDMS sensor of the same dimensions), while the measurement range was reduced from a factor of 2 to 3 (from 594 kPa for a bulk PDMS sensor down to between 255 and 177 kPa for a PDMS foam sensor of the same dimensions, according to the porosity). This study opens the way to the design and fabrication of wearable flexible pressure sensors with adjustable performances through the control of the porosity of the fabricated PDMS foams.

Binary Spiky/Spherical Nanoparticle Films with Hierarchical Micro/Nanostructures for High-Performance Flexible Pressure Sensors

2020 ◽  
Vol 12 (52) ◽  
pp. 58403-58411
Author(s):  
Young-Ryul Kim ◽  
Minsoo P. Kim ◽  
Jonghwa Park ◽  
Youngoh Lee ◽  
Sujoy Kumar Ghosh ◽  
...  
Keyword(s):  
High Performance ◽  
Pressure Sensors ◽  
Nanoparticle Films ◽  
Flexible Pressure Sensors

Flexible pressure sensing film based on ultra-sensitive SWCNT/PDMS spheres for monitoring human pulse signals

2015 ◽  
Vol 3 (27) ◽  
pp. 5436-5441 ◽  
Author(s):  
Yan-Long Tai ◽  
Zhen-Guo Yang
Keyword(s):  
Pressure Sensors ◽  
Pressure Sensing ◽  
Prosthetic Limbs ◽  
Electronic Skin ◽  
Essential Components ◽  
Biomedical Diagnostics ◽  
Healthcare Monitoring ◽  
Flexible Pressure Sensors ◽  
Human Healthcare

Flexible pressure sensors are essential components of an electronic skin for future attractive applications ranging from human healthcare monitoring to biomedical diagnostics to robotic skins to prosthetic limbs.

Multi length scale hierarchical architecture overcoming pressure sensing range-speed tradeoff for flexible pressure sensors

2021 ◽  
Author(s):  
Qiong Tian ◽  
Wenrong Yan ◽  
Tianding CHEN ◽  
Derek Ho
Keyword(s):  
Biomedical Applications ◽  
Pressure Sensors ◽  
Human Machine Interface ◽  
Hierarchical Architecture ◽  
Soft Robotics ◽  
Length Scale ◽  
Pressure Sensing ◽  
Sensing Range ◽  
Machine Interface ◽  
Flexible Pressure Sensors

Pressure sensing electronics have gained great attention in human-machine interface, soft robotics, and wearable biomedical applications. However, existing sensor architectures are inadequate in overcoming the classic tradeoff between sensing range,...

Oxidized Ti3C2Tx film-based high-performance flexible pressure sensors

2021 ◽  
Author(s):  
Xiyao Fu ◽  
Depeng Wang ◽  
Lili Wang ◽  
Hao Xu ◽  
Valerii Shulga ◽  
...  
Keyword(s):  
High Performance ◽  
Pressure Sensors ◽  
Flexible Pressure Sensors

Highly sensitive and stable flexible pressure sensors with micro-structured electrodes

2017 ◽  
Vol 699 ◽  
pp. 824-831 ◽  
Author(s):  
Yong Quan ◽  
Xiongbang Wei ◽  
Lun Xiao ◽  
Tao Wu ◽  
Hanying Pang ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Highly Sensitive ◽  
Flexible Pressure Sensors
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