Ion‐Conductive Hydrogel‐Based Stretchable, Self‐Healing, and Transparent NO₂ Sensor with High Sensitivity and Selectivity at Room Temperature

Here stretchable, self-healable, and transparent gas sensors based on salt-infiltrated hydrogels for high-performance NO2 sensing in both anaerobic environment and air at room temperature, are reported. The salt-infiltrated hydrogel displays high sensitivity to NO2 (119.9%/ppm), short response and recovery time (29.8 and 41.0 s, respectively), good linearity, low theoretical limit of detection (LOD) of 86 ppt, high selectivity, stability, and...