Journal
TALANTA
Volume 245, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2022.123481
Keywords
Wearable electrochemical sensor; Sweat analysis; pH and K plus; Printing technology; ?-CD functionalized Graphene
Categories
Funding
- National Natural Science Foundation of China [21974032, U2006208, 21974033]
- Guangdong Prov-ince Key Area R&D Program, China [2019B010933001]
- Science and Technology Research Project of Guangzhou [202102020622]
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In this study, a wearable electrochemical sensor was developed for pH and K+ monitoring in sweat. The sensor consisted of flexible reference electrode, pH response electrode, and K+ selective electrode. The sensor exhibited good stability and accuracy in measuring sweat pH and K+ concentration.
Here, we developed a wearable electrochemical sensor for pH and K+ monitoring in sweat. The sensor was composed of flexible reference electrode, pH response electrode and K+ selective electrode, which were prepared through printing beta-CD functionalized graphene (beta-CD/RGO) water suspension on conductive PET substrate with microelectronic printer. beta-CD/RGO not only served as the pH sensitive material for pH response electrode with good sensitivity, selectivity and reproducibility due to its abundant oxygen-containing functional groups, but also worked as the ion-to-electron transducer for K+ selective electrode with good sensitivity. The wearable sensor exhibited good potential stability at different bending states. On-body sweat pH and K+ measurements showed high accuracy compared with ex-situ analysis.
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