A multidirectional triboelectric haptic sensor that integrates rigid and flexible components, designed with a bionic finger structure

Sensors utilizing friction nanopower generation possess the ability to directly transform external stimuli into electrical signals. This allows for the assessment of external stimuli based on variations in these electrical signals, thereby facilitating self-powered sensing. Notably, the integration of rigid-flexible coupling technology in tactile sensors addresses the viscoelastic limitations inherent to traditional flexible tactile sensors. The development of an ultra-sensitive triboelectric tactile sensor, which combines a hybrid force transfer layer of rigid and soft materials with a compliant bottom friction layer, is suitable for dynamic force detection. Experimental results demonstrate that the sensor possesses a high sensitivity of 1240mV/kPa and a broad force detection range from 0.1 to 1500kPa. Furthermore, this tactile sensor can discern multiple force directions, offering significant promise for applications in wearable sensing.