A Cost-Effective, Impediometric Na+-Sensor in Fluids

被引：7

作者：

Pfeffer, Christian ^{[1
]}

Zips, Sabine ^{[1
]}

Muellner, Ernst ^{[2
]}

Hefele, Markus ^{[3
]}

Kreupl, Franz ^{[1
]}

Wolf, Bernhard ^{[1
,3
]}

Wolfrum, Bernhard ^{[1
]}

Liang, Yue ^{[1
]}

Brederlow, Ralf ^{[1
]}

机构：

[1] Tech Univ Munich, D-80333 Munich, Germany

[2] Texas Instruments Deutschland GmbH, D-85356 Freising Weihenstephan, Germany

[3] Steinbeistransferzentrum Med Elekt & Lab On Chip, D-80802 Munich, Germany

来源：

IEEE SENSORS LETTERS | 2021年 / 5卷 / 06期

关键词：

Chemical and biological sensors; biosensors; biotech; dielectric impedance spectroscopy; electrochemical impedance spectroscopy (EIS); flexible sensor; ion-selective membrane (ISM); Internet-of-Things (IoT); printed sensor; ION; MEMBRANES;

D O I：

10.1109/LSENS.2021.3069107

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A crucial parameter in the body-fluid analysis is Na+-ions. Preferably realized as a small wearable, mostly the fabrication method, size, and costs prevented ion-selective devices to enter the big realm of IoT applications. This letter reports a printed, electrochemical sensor system for measuring Na+-ions in liquids. We designed, simulated, optimized, fabricated, and experimentally evaluated the sensor structures. Employing electrochemical impedance spectroscopy on a printable, dielectric ion-selective membrane, reproducible 2-electrode-measurement results are achieved in a biological-relevant mM-range. The cross-sensitivity toward K+-ions, dynamic range, and drift are investigated, and a robust measurement scheme is derived. The flexible, low-cost approach can enable new Internet-of-Things and point-of-care applications in biomedicine such as sweat analysis and environmental monitoring.

引用

页数：4

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