An Autofluorescent Hydrogel with Water‐Dependent Emission for Dehydration‐Visualizable Smart Wearable Electronics

Abstract Wearable flexible electronics that are derived from hydrogels inevitably undergo dehydration, and the sensing performance is highly affected because stretchability conductivity weaken. Monitoring water retention rate of as they operate without dismantling assembled device vital for evaluating performances intervening in a timely manner to address problem. However, relevant research still lacking. Herein, an autofluorescent hydrogel engineered based on clusterization‐triggered emission (CTE) wearable strain‐sensing can self‐visualizing dehydration. The fluorescence intensity CTE‐type depends aggregation level molecule clusters dangled gel networks, which dominated by hydrogel. Thus, dehydration process be reflected fluorescent images taken scenario long‐term strain‐sensing. This strategy helps operator evaluate removing it then quickly In addition, this also applicable dehydration‐tolerant systems, demonstrating versatility Overall, will promote development high‐performance smart electronics.