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Microdome-Tunable Graphene/Carbon Nanotubes Pressure Sensors Based on Polystyrene Array for Wearable Electronics
Xingjie Su1, Chunli Luo1, Weiguo Yan2
1School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China.
Materials (Basel, Switzerland)
|December 10, 2021
Summary
Flexible pressure sensors with tunable sensitivity were created using microsphere self-assembly and graphene/carbon nanotube coatings. This novel design shows promise for effective human motion monitoring applications.
Area of Science:
- Materials Science
- Nanotechnology
- Sensor Technology
Background:
- Resistive pressure sensors offer advantages like simple mechanisms and fast response.
- Developing adaptable microstructures in sensing materials is crucial for flexible pressure sensors.
Purpose of the Study:
- To create a flexible, tunable resistive pressure sensor using cost-effective methods.
- To investigate the impact of microstructure and material composition on sensor performance.
Main Methods:
- Fabrication of a flexible pressure sensor utilizing polystyrene (PS) microspheres for microstructure and graphene/carbon nanotubes (CNTs) as conductive fillers.
- Employing microsphere self-assembly and solution drop coating techniques.
- Characterizing sensor performance based on varying microsphere diameter and conductive layer count.
Main Results:
- The interlocked microdome microstructure demonstrated superior sensitivity compared to simpler designs.
- Sensor sensitivity is tunable by altering PS microsphere diameter.
- Electrical resistance is adjustable by modifying the number of graphene/CNT coating layers.
Conclusions:
- A flexible, tunable resistive pressure sensor was successfully developed.
- The sensor effectively detected human finger bending, indicating potential for human motion monitoring.
- The fabrication method is simple, low-cost, and scalable.
