Highly Sensitive Wearable Pressure Sensor Over a Wide Sensing Range Enabled by the Skin Surface-Like 3D Patterned Interwoven Structure

Flexible electronic equipment is an emerging field in recent years, which attaches more attention to be researched and applied in health monitoring and human-machine interface. However, for the existing pressure sensors, even a very slight pressure will greatly reduce their sensitivity, so it is an urgent problem to be solved for achieving high sensitivity and wide application range simultaneously. Hence, a high-performance piezoresistive pressure sensor based on PAN nanofiber films (PAN NFs) and MXene (Ti3C2Tx) is proposed. The realization of high sensitivity and wide sensing range is based on the microstructure of accordion-like MXene and the macrostructure of fluffy porous blowing spinning PAN nanofibers, which exhibits a high sensitivity of 81.89 kPa(-1) over a wide sensing range of 0.83-38.13 kPa and the dynamic responses to external pressures can reach 98.73 kPa. The pressure sensors based on skin surface-like 3D patterned interwoven structure are used for health monitoring and tiny pressure detecting. Moreover, the application in human-machine interface is demonstrated. Additionally, to meet the requirement of long-term wearing, the structure of the sensor is optimized and endowed with excellent breathability and conformal properties, which promotes the further development of flexible electronic equipment.