Nanofibrous metal oxide semiconductor for sensory face masks

Sensory face masks are designed to integrate sensors that monitor health metrics, such as breathing rate and body temperature, thereby providing continuous physiological data. However, current sensing materials are predominantly in film form. In this study, we report on the use of fibrous amorphous indium gallium zinc oxide, which offers an enlarged surface area to facilitate gas diffusion and transport into charge-carrying sites. A detailed morphological analysis and an electrical investigation of this fibrous network were conducted. By integrating this material with a wireless, miniaturised flexible circuit and mounting it on a face mask, we successfully monitored different human respiratory states in real time. This wearable face mask demonstrates the potential for promising applications in health monitoring. • Amorphous IGZO nanofibers enhance surface interaction and gas sensing performance. • IGZO nanofibers-based sensors effectively differentiate human respiratory states. • Wireless, wearable face mask enables real-time respiratory monitoring.