Hollow-Structured Ti ₃ C ₂ T _<i>x</i> Composite Fibers for Enhanced Pressure–Humidity Bifunctional Sensing in Febrile Convulsion Detection

Wearable bifunctional sensors demonstrate considerable potential for implementation in early warning systems targeting febrile convulsions. However, significant challenges persist in simultaneously achieving real-time and precise detection of dual sensing modalities with accurate signal discrimination for clinical diagnosis. Here, we have fabricated hollow-microstructure Ti₃C₂T_<i>x</i>/poly(benzodifurandione) composite fibers for synergistic optimization of humidity-pressure sensing performance through rational microstructure engineering of the sensitive layer coupled with the dynamic reconfiguration of conductive pathways. The bifunctional sensor provides high sensitivity (168.72 kPa^-1), a low detection limit (0.67 Pa) for pressure sensing, rapid response/recovery time (3 s/20 s), and low humidity hysteresis (2.18% RH) for humidity sensing. Integrated with a control circuit, a febrile convulsion early alarm system is established for real-time monitoring of muscle activities and breathing rate by sending an early alarm to the mobile terminal when in abnormal conditions. This work develops a new avenue for prompt treatment of intelligent healthcare.