Deformable, transparent, high-performance, room-temperature oxygen sensors based on ion-conductive, environment-tolerant, and green organohydrogels

Yuanqing Lin, Zixuan Wu, Chunwei Li, Qiongling Ding, Kai Tao, Kankan Zhai, Meiwan Chen, Meital Zilberman, Xi Xie, Jin Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

We present green organohydrogel-based stretchable (up to 700% strain), transparent, and room-temperature O2 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 O2 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 O2 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 O2 sensor using stable and green organohydrogels as novel transducing materials for practical wearable applications. (Figure presented.).

Original languageEnglish
Article numbere12220
JournalEcoMat
Volume4
Issue number6
DOIs
StatePublished - Nov 2022

Funding

FundersFunder number
National Natural Science Foundation of China61801525
Sun Yat-sen University22lgqb17
Guangzhou Science and Technology Program key projects201907010038, 201904010456
Fundamental Research Funds for the Central Universities
Basic and Applied Basic Research Foundation of Guangdong Province2020A1515010693, 2021A1515110269

    Keywords

    • anti-freezing and anti-drying hydrogel
    • conductive and green organohydrogel
    • redox reaction sensing mechanism
    • stretchable and room-temperature oxygen sensor
    • xylitol and sorbitol

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