Ga1−xAlxAs material for high-sensitivity pressure sensors

In this paper, novel pressure sensors approach is proposed and described. Active devices and oscillating circuits are directly integrated on very thin dielectric membranes as pressure transducers. Involved patterning of the membrane is supposed to cause a drop of mechanical robustness. Finite elements simulations are performed in order to better understand stress/strain distribution and as an attempt to explain the early burst of patterned membranes. Smart circuit designs are reported as solutions with high sensitivity and reduced footprint on membranes.

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Flexible Pressure Sensors with Wide Linearity Range and High Sensitivity Based on Selective Laser Sintering 3D Printing

Advanced Materials Technologies ◽

10.1002/admt.201900679 ◽

2019 ◽

Vol 4 (12) ◽

pp. 1900679 ◽

Cited By ~ 4

Author(s):

Tong Zhang ◽

Zhaoyang Li ◽

Kun Li ◽

Xiaoniu Yang

Keyword(s):

3D Printing ◽

Selective Laser Sintering ◽

Pressure Sensors ◽

High Sensitivity ◽

Laser Sintering ◽

Linearity Range ◽

Flexible Pressure Sensors

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Wearable Pressure Sensors Based on Carbonized Graphene Coated Waste Paper Aerogel

10.21203/rs.3.rs-741840/v1 ◽

2021 ◽

Author(s):

Ang Li ◽

Ce Cui ◽

Weijie Wang ◽

Yue Zhang ◽

Jianyu Zhai ◽

...

Keyword(s):

3D Structure ◽

Pressure Sensors ◽

High Sensitivity ◽

Waste Paper ◽

Low Density ◽

Detection Range ◽

Simple Strategy ◽

Simple Filtration ◽

Piezoresistive Pressure Sensors ◽

Main Component

Abstract Graphene is complexed with cellulose fibers to construct 3D aerogels, which is generally considered to be an environmentally friendly and simple strategy to achieve wide sensing, high sensitivity and low detection of wearable piezoresistive pressure sensors. Here, graphene is incorporated into waste paper fibers with cellulose as the main component to prepare graphene coated waste paper aerogel (GWA) using a simple “filtration-oven drying” method under atmospheric pressure. The GWA was further annealed to obtain the carbonized graphene coated waste paper aerogel (C-GWA) to achieve low density and excellent resilience. The result shows that the C-GWA has a rough outer surface due to the 3D structure formed by interpenetrated fibers and the carbon skeleton with wrinkles. The sensor based on GCA shows low density (25mg/cm3), a wide detection range of 0-132 kPa, an ultra-low detection limit of 2.5 Pa (a green bean, ≈ 53.4 mg), and a high sensitivity of 31.6 kPa− 1. In addition, the sensor based on C-GWA with the excellent performance can be used to detect human motions including the pulse of the human body, cheek blowing and bending of human joints. The result indicates that the sensor based on C-GWA shows great potential for wearable electronic products.

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High Sensitivity, Wearable, Piezoresistive Pressure Sensors Based on Irregular Microhump Structures and Its Applications in Body Motion Sensing

Small ◽

10.1002/smll.201601419 ◽

2016 ◽

Vol 12 (28) ◽

pp. 3827-3836 ◽

Cited By ~ 94

Author(s):

Zongrong Wang ◽

Shan Wang ◽

Jifang Zeng ◽

Xiaochen Ren ◽

Adrian J. Y. Chee ◽

...

Keyword(s):

Pressure Sensors ◽

High Sensitivity ◽

Body Motion ◽

Motion Sensing ◽

Piezoresistive Pressure Sensors

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Development Of PVDF Thick Film Interdigitated Capacitors For Pressure Measurement On Flexible Melinex Substrates

MRS Proceedings ◽

10.1557/proc-870-h2.4 ◽

2005 ◽

Vol 870 ◽

Cited By ~ 1

Author(s):

Arous Arshak ◽

Khalil Arshak ◽

Deirdre Morris ◽

Olga Korostynska ◽

Essa Jafer

Keyword(s):

Polymer Film ◽

Thick Film ◽

Pressure Measurement ◽

Pressure Sensors ◽

High Sensitivity ◽

Strain Gauges ◽

Interdigitated Electrodes ◽

Higher Sensitivity

AbstractIn this work, a PVDF thick film paste was deposited onto interdigitated electrodes to form a capacitor. Two different substrates, alumina and Melinex® were used. Capacitors, fabricated on alumina substrates were tested as strain gauges, and showed a high sensitivity with low hysteresis. Capacitors on Melinex® substrates were tested as pressure sensors by adhering them to planar and cylindrical surfaces and subjecting them to pressures up to 300 kPa. Their sensitivity and hysteresis during cycling were examined and compared. It was found that sensors on cylindrical surfaces showed a higher sensitivity, however the hysteresis was also increased. It is thought that this is due to instabilities in the polymer film, accentuated by stretching of the substrate.

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Highly responsive screen-printed asymmetric pressure sensor based on laser-induced graphene

Journal of Micromechanics and Microengineering ◽

10.1088/1361-6439/ac388d ◽

2021 ◽

Author(s):

Jiang Zhao ◽

Jiahao Gui ◽

Jinsong Luo ◽

Jing Gao ◽

Caidong Zheng ◽

...

Keyword(s):

Pressure Sensor ◽

Screen Printing ◽

Large Scale ◽

Low Cost ◽

Pressure Sensors ◽

High Sensitivity ◽

Wearable Electronics ◽

Integrated Sensor ◽

Patterned Electrodes ◽

Screen Printed

Abstract Graphene-based pressure sensors have received extensive attention in wearable devices. However, reliable, low-cost, and large-scale preparation of structurally stable graphene electrodes for flexible pressure sensors is still a challenge. Herein, for the first time, laser-induced graphene (LIG) powder are prepared into screen printing ink, and shape-controllable LIG patterned electrodes can be obtained on various substrates using a facile screen printing process, and a novel asymmetric pressure sensor composed of the resulting screen-printed LIG electrodes has been developed. Benefit from the 3D porous structure of LIG, the as-prepared flexible LIG screen-printed asymmetric pressure sensor has super sensing properties with a high sensitivity of 1.86 kPa−1, low detection limit of about 3.4 Pa, short response time, and long cycle durability. Such excellent sensing performances give our flexible asymmetric LIG screen-printed pressure sensor the ability to realize real-time detection of tiny body physiological movements (such as wrist pulse and pronunciation action). Besides, the integrated sensor array has a multi-touch function. This work could stimulate an appropriate approach to designing shape-controllable LIG screen-printed patterned electrodes on various flexible substrates to adapt the specific needs of fulfilling compatibility and modular integration for potential application prospects in wearable electronics.

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Modeling and Simulation of the Thermal Drift Characteristics of the Piezoresistive Pressure Sensor

Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) ◽

10.4071/hitec-rotmani-tha24 ◽

2010 ◽

Vol 2010 (HITEC) ◽

pp. 000373-000378

Author(s):

R. Otmani ◽

N. Benmoussa ◽

K. Ghaffour

Keyword(s):

Thermal Behavior ◽

Modeling And Simulation ◽

Pressure Sensor ◽

Pressure Sensors ◽

High Sensitivity ◽

Thermal Drift ◽

Piezoresistive Pressure Sensor ◽

Output Characteristics ◽

Piezoresistive Pressure Sensors

Piezoresistive pressure sensors based on Silicon have a large thermal drift because of their high sensitivity to temperature (ten times more sensitive to temperature than metals). So the study of the thermal behavior of these sensors is essential to define the parameters that cause the drift of the output characteristics. In this study, we adopted the behavior of 2nd degree gauges depending on the temperature. Then we model the thermal behavior of the sensor and its characteristics.

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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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