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

Authors
 Hyo-Ryoung Lim  ;  Yun-Soung Kim  ;  Shinjae Kwon  ;  Musa Mahmood  ;  Young-Tae Kwon  ;  Yongkuk Lee  ;  Soon Min Lee  ;  Woon-Hong Yeo 
Citation
 SENSORS, Vol.20(11) : 3297, 2020-06 
Journal Title
SENSORS
Issue Date
2020-06
Keywords
carbon–polymer composite transducer ; ion-selective electrode ; sodium detection ; wireless flexible sensor system
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.
Files in This Item:
T202006444.pdf Download
DOI
10.3390/s20113297
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pediatrics (소아과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Soon Min(이순민) ORCID logo https://orcid.org/0000-0003-0174-1065
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/182644
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