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Flexible sensors have shown significant potential for applications in smart wearable devices, electronic skin, and health monitoring. However, developing high-performance sensors with a wide sensing range and high sensitivity using simple and cost-effective fabrication methods remains a challenge. Unlike traditional single-function sensors that can only detect strain, a flexible wearable pressure–temperature dual-functional sensor based on an electrospun nanofiber platform was developed in this study. A resistive pressure sensor was fabricated by spraying a graphene/MXene composite solution onto polyurethane (PU) nanofibers film. Additionally, a resistive temperature sensor was also coupled onto the pressure sensor by combining graphene/MXene with poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS), forming a dual-functional sensor. The fabricated sensors exhibit ultra-high sensitivity (GF ≈ 1200), fast response times (110 ms), high durability, and stable performance without degradation even after up to 5,000 cycles of motion. This dual-functional sensor can achieve precise temperature detection with a resolution of 1 °C. In practical applications, the sensor can be comfortably worn on the wrist, enabling real-time monitoring of subtle strain changes such as pulse beats and large strain variations like finger bending, as well as temperature fluctuations such as body temperature.
Zhang et al. (Tue,) studied this question.