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Wireless, Flexible, Ion-Selective Electrode System for Selective and Repeatable Detection of Sodium.


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.

SUBMITTER: Lim HR 

PROVIDER: S-EPMC7309126 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Wireless, Flexible, Ion-Selective Electrode System for Selective and Repeatable Detection of Sodium.

Lim Hyo-Ryoung HR   Kim Yun-Soung YS   Kwon Shinjae S   Mahmood Musa M   Kwon Young-Tae YT   Lee Yongkuk Y   Lee Soon Min SM   Yeo Woon-Hong WH  

Sensors (Basel, Switzerland) 20200610 11


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  ...[more]

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