A laser ablated graphene-based flexible self-powered pressure sensor for human gestures and finger pulse monitoring

This work establishes a reliable, eco-friendly, and low-cost fabrication scheme for a novel TENG-based pressure sensor (TEPS). The sensor is designed for self-powered human gesture detection and wearable healthcare applications. Unlike conventional methods, this approach avoids expensive, multi-step techniques, making it suitable for mass production.

• Fabrication of a low-cost, eco-friendly, TENG-based pressure sensor (TEPS).
• High sensitivity, low limit of detection, and fast response time.
• Highly stable performance over 4,000 compression-releasing cycles.
• Adaptable fabrication method with applications in e-skin and healthcare.

The TEPS was fabricated using a laser ablation method to create microstructured electrodes. The sensor's performance was characterized by measuring its sensitivity, limit of detection, response time, and stability over numerous cycles.

The sensor with microstructured electrodes exhibited high sensitivity (7.697 kPa⁻¹), a low detection limit (~1 Pa), a fast response time (< 9.9 ms), and high stability. The proposed fabrication method is suitable for scalable production of TEPS for self-powered systems.