Abstract
Flexible, wearable and breathable pressure sensors have received tremendous interest for various potential applications in wearable electronic skins, intelligent robotics, healthcare biomonitoring, and artificial intelligence. However, it remains a critical challenge to simultaneously achieve high sensitivity, broad sensing range, excellent mechanical stability, fast response/recovery, and reliable breathability for long-term wearing for ultrasensitive comfortable full-scale biomonitoring. Herein, we present a wearable, highly sensitive, broad-range and breathable pressure sensor by sandwiching the interconnected nanocomposites of carbonized metal-organic framework (C-MOF) and polyaniline nanofiber (PANIF) on polyurethane (PU) sponge (C-MOF/PANIF@PU) between a breathable fabric and an interdigitated electrode-coated fabric. The assembled sensor exhibits a broad sensing range (up to 60 kPa), high sensitivity (158.26 kPa−1), fast response/recovery time (22 ms/20 ms), reliable breathability, wireless biomonitoring, and an excellent repeatability over 15,000 cycles. It can be assembled as smart artificial electronic skins (E-skins) for mapping tactile stimuli. This work paves the way for the design of wearable, breathable, highly sensitive and broad-range pressure sensor with potential versatile applications in next-generation artificial skins, personal healthcare monitoring, clinical diagnosis, and human-machine interactions.
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