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Wireless, flexible, ion-selective electrode system for selective and repeatable detection of sodium
Lim, Hyo-ryoung Kim, Yunsoung Kwon, Shinjae Mahmood, Musa Kwon, Young-Tae Lee, Yongkuk Lee, Soon-min Yeo, Woon-Hong
Lim, Hyo-ryoung
Kim, Yunsoung
Kwon, Shinjae
Mahmood, Musa
Kwon, Young-Tae
Lee, Yongkuk
Lee, Soon-min
Yeo, Woon-Hong
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LeeYon_2020.pdf
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2020-06-10
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Article
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Keywords
Carbon,Ion-selective electrode,Polymer composite transducer,Sodium detection,Wireless flexible sensor system
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Citation
Lim, H.-R.; Kim, Y.-S.; Kwon, S.; Mahmood, M.; Kwon, Y.-T.; Lee, Y.; Lee, S.M.; Yeo, W.-H. Wireless, Flexible, Ion-Selective Electrode System for Selective and Repeatable Detection of Sodium. Sensors 2020, 20, 3297
Abstract
Wireless, flexible, ion-selective electrodes (ISEs) are of great interest in the development of wearable health monitors and clinical systems. Existing film-based electrochemical sensors, however, still have practical limitations due to poor electrical contact and material–interfacial leakage. Here, we introduce a wireless, flexible film-based system with a highly selective, stable, and reliable sodium sensor. A flexible and hydrophobic composite with carbon black and soft elastomer serves as an ion-to-electron transducer offering cost efficiency, design simplicity, and long-term stability. The sensor package demonstrates repeatable analysis of selective sodium detection in saliva with good sensitivity (56.1 mV/decade), stability (0.53 mV/h), and selectivity coefficient of sodium against potassium (−3.0). The film ISEs have an additional membrane coating that provides reinforced stability for the sensor upon mechanical bending. Collectively, the comprehensive study of materials, surface chemistry, and sensor design in this work shows the potential of the wireless flexible sensor system for low-profile wearable applications.
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© 2020 Authors. Articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited.
Publisher
MDPI AG
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Sensors;v.20:no.11
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1424-8220