Highly Sensitive Iontronic Pressure Sensor with Side-by-Side Package Based on Alveoli and Arch Structure

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Flexible pressure sensors are crucial for wearable technology and electronic skin applications.
• Iontronic pressure sensors offer high sensitivity, wide measurement range, and high resolution, meeting demanding requirements.

Purpose of the Study:

• To develop a novel graded hollow ball arch (GHBA) microstructure for enhanced iontronic pressure sensors.
• To improve sensor sensitivity, compressibility, and pressure distribution capabilities.

Main Methods:

• Fabrication of GHBA microstructure using a double-sided structure with mold casting and moisture evaporation.
• Implementation of a novel side-by-side packaging structure for efficient pressure transfer.
• Characterization of sensor performance, including sensitivity, resolution, and response time.

Main Results:

• The GHBA microstructure significantly improves sensor sensitivity.
• Achieved a maximum sensitivity of 10,420.8 kPa⁻¹, pressure resolution of 0.1% (at 100 kPa), and rapid response/recovery times (40/35 ms).
• Demonstrated capabilities in monitoring exercises and correcting posture in wearable devices, and detecting wind sources and classifying objects in electronic skin applications.

Conclusions:

• The proposed GHBA microstructure and packaging method offer a promising approach for high-performance iontronic pressure sensors.
• The developed sensor shows potential for advanced applications in wearable devices and electronic skin.