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Wrinkle Clamp Down on Structure Crack Strain Sensor Based on High Poisson's Ratio Material for Home Health Monitoring
Yuanlong Zhang1,2,3, Yu Xiao1,2,3, Yun Xu1,2,3
1Institution of Semiconductors, Chinese Academy of Sciences, Beijing 100089, China.
ACS Applied Materials & Interfaces
|June 21, 2023
Summary
This study introduces a novel wearable crack strain sensor with a tunable wrinkle clamp down structure (WCDS). This innovative design enhances sensitivity, stability, and strain range for physiological monitoring and human-machine interaction.
Area of Science:
- Materials Science
- Mechanical Engineering
- Biomedical Engineering
Background:
- Flexible wearable crack strain sensors are crucial for physiological monitoring and human-machine interaction.
- Existing sensors face challenges in achieving high sensitivity, repeatability, and a wide sensing range simultaneously.
Purpose of the Study:
- To propose and demonstrate a tunable wrinkle clamp down structure (WCDS) crack strain sensor.
- To enhance sensor performance, including sensitivity, stability, and strain range, using a high Poisson's ratio material.
Main Methods:
- Fabrication of the WCDS sensor using a prestretching process on an acrylic acid film with a high Poisson's ratio.
- Incorporation of wrinkle structures to improve cyclic stability and tensile properties.
- Integration of wrinkles into gold stripes connecting separated gold flakes.
Main Results:
- Achieved a high sensitivity of 3627.
- Demonstrated stable operation over 10,000 cycles.
- Obtained a wide strain range of approximately 9% with low dynamic response and good frequency characteristics.
Conclusions:
- The WCDS crack strain sensor offers superior performance for wearable applications.
- The sensor is suitable for pulse wave and heart rate monitoring, posture recognition, and game control.
- The developed structure addresses key limitations in current wearable strain sensing technology.
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