Self‐Powered Switchable Gas‐Humidity Difunctional Flexible Chemosensors Based on Smart Adaptable Hydrogel

Abstract The development of self‐powered, flexible, and multi‐function sensors is highly anticipated in wearable electronics, however, it remains a daunting challenge to identify different signals based on a single device with singular sensing material without algorithmic support. Here, a smart adaptable hydrogel is developed by co‐introducing two ions with vastly different hydrophilicity for the construction of an electrochemically self‐powered, flexible, and reversibly switchable difunctional chemosensor with a metal‐air battery structure. The prepared hydrogel can readily switch between water‐rich and water‐deficient states for crosstalk‐free detection of oxygen and humidity respectively, since O 2 gas and…

• NN
  National Natural Science Foundation of China

  Award: 22475243 62401403 52103252 61801525
• NK
  National Key Research and Development Program of China

  Award: 2024YFA1207804