Deformable, transparent, high‐performance, <scp>room‐temperature</scp> oxygen sensors based on <scp>ion‐conductive</scp>, <scp>environment‐tolerant,</scp> and green organohydrogels
Yuanqing Lin, Zixuan Wu, Chunwei Li, Qiongling Ding, Kai Tao, Kankan Zhai, Meiwan Chen, Meital Zilberman, Xi Xie, Jin Wu
Abstract
Abstract We present green organohydrogel‐based stretchable (up to 700% strain), transparent, and room‐temperature O 2 sensors with impressive performance, including drying and freezing tolerances, high sensitivity, broad detection range (100 ppm‐100%), long‐term stability, low theoretical detection limit (0.585 ppm), linearity, and the capability to real‐time monitor human respiration by directly attaching on human skin. A facile solvent replacement approach is employed to partially exchange water with natural and edible xylitol/sorbitol molecules, generating stable, green and tough organohydrogels. Compared with the pristine hydrogel counterpart, the organohydrogel‐based O 2 sensors feature higher stability, prolonged life time (140 days) and the ability to work over a wide range of temperatures (−38 to 65°C). The O 2 sensing mechanism is elucidated by investigating the redox reactions occurred at the electrode‐hydrogel interface. This work develops a facile strategy to fabricate stretchable, transparent, and high‐performance O 2 sensor using stable and green organohydrogels as novel transducing materials for practical wearable applications. image