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

12 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
National Natural Science Foundation of China
Sun Yat-sen University22lgqb17
Sun Yat-sen University
Guangzhou Science and Technology Program key projects201907010038, 201904010456
Guangzhou Science and Technology Program key projects
Fundamental Research Funds for the Central Universities
Basic and Applied Basic Research Foundation of Guangdong Province2020A1515010693, 2021A1515110269
Basic and Applied Basic Research Foundation of Guangdong Province

    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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