High-performance flexible tactile pressure sensor via MXene/Bi/tissue paper composite films for wearable electronics.

Highly adaptable pressure sensors are gaining significant interest due to their potential applications in areas, such as artificial skin for wearables, health tracking, and human-machine interface. Here, a new strategy for the fabrication of a flexible wearable pressure sensor based on tissue paper coated with MXene/Bi is reported. Leveraging the inherent flexibility and 3D porous structure of cotton fabric, the sensor demonstrates exceptional performance with high sensitivity (2.73 kPa⁻¹ within 0-20 kPa), a wide detection range (0-1200 kPa), fast response/recovery times (210/100 ms), and long-term durability (3000 cycles). The developed sensor is versatile and suitable for diverse pressure detection, including finger pressing, wrist pulse monitoring, handwriting, and speech recognition. Importantly, tactile sensor array is also designed for the recognition of different tactile stimuli, showcasing significant potential for use in advanced sensor technologies and next-generation wearable electronics.