High sensitivity tactile sensor based on Ti2C-PDMS sponge for wireless human-computer interaction.

Tremendous attention has been paid to the high-performance flexible tactile sensors owe to their potential applications in bionic skin, wearable electronics, the Internet of Things, et.al. However, the majority of pressure sensors require intricate designed nanostructure with a high-cost complex manufacturing process. Therefore, the high throughput and low-cost technology of producing high sensitivity, flexible pressure-sensitive materials with a large responding range are urgently needed. Herein, a novel flexible piezoresistive tactile sensor is fabricated based on the Ti2C-PDMS sponge as the conductive elastomer. The sensor exhibits high sensitivity of 279 kPa-1 in a wide pressure range (0 - 34.4 kPa). The response time is as fast as 0.45 s with excellent durability over 4,000 cycles. Moreover, a 16-pixel wireless sensor system is fabricated and a series of applications have been demonstrated including real-time force perception and pressure morphology feedback, which promote the potential applications in the visualizing pressure distribution, human-machine communication and wearable devices.