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Ultrawide Sensing Range and Highly Sensitive Flexible Pressure Sensor Based on a Percolative Thin Film with a
Shuwen Jiang1, Jiangtao Yu1, Yao Xiao1
1State Key Laboratory of Electronic Thin Films and Integrated Devices , University of Electronic Science and Technology of China , Chengdu 611731 , China.
ACS Applied Materials & Interfaces
|May 16, 2019
Summary
Researchers developed cost-effective flexible pressure sensors using screen printing. These sensors offer high sensitivity across a wide pressure range, enabling applications in health monitoring and human-machine interfacing.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Flexible pressure sensors are crucial for wearable devices, health monitoring, and human-machine interfaces.
- Practical applications demand high sensitivity, wide working ranges, and low cost.
Purpose of the Study:
- To develop highly sensitive flexible pressure sensors with a wide pressure range using a cost-effective method.
- To explore the potential applications of these sensors in various fields.
Main Methods:
- Fabrication of a knoll-like microstructured surface on a thermoplastic polyurethane/carbon black film.
- Utilizing a facile, efficient, and cost-effective screen-printing technique.
- Characterization of sensor performance, including sensitivity, pressure range, response time, and durability.
Main Results:
- Achieved an ultrawide sensing pressure range of 0-1500 kPa.
- Demonstrated high sensitivity (5.205 kPa⁻¹ from 0-100 kPa and 0.63 kPa⁻¹ above 1200 kPa).
- Exhibited fast response and excellent durability over 30,000 cycles.
Conclusions:
- The developed screen-printed flexible pressure sensors meet key requirements for practical applications.
- The sensors show significant potential for health monitoring (pulse waves, phonation, vibrations) and human-machine interfacing (object manipulation, grip force, gas pressure monitoring).
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