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Biocompatible and flexible paper-based metal electrode for potentiometric wearable wireless biosensing.
- Source :
- Science & Technology of Advanced Materials; Dec2020, Vol. 21 Issue 1, p379-387, 9p
- Publication Year :
- 2020
-
Abstract
- A paper-based electrode is a very attractive component for a disposable, nontoxic, and flexible biosensor. In particular, wearable biosensors, which have recently been attracting interest, not only require these characteristics of paper-based electrodes but must also be able to detect various ions and biomolecules in biological fluids. In this paper, we demonstrate the detection ability of paper-based metal electrodes for wearable biosensors as part of a wireless potentiometric measurement system, focusing on the detection of pH and sodium ions. The paper-based metal electrodes were obtained by simply coating a silicone-rubber-coated paper sheet with a Au (/Cr) thin film by sputtering then modifying it with different functional membranes such as an oxide membrane (Ta<subscript>2</subscript>O<subscript>5</subscript>) and a fluoropolysilicone (FPS)-based Na<superscript>+</superscript>-sensitive membrane, corresponding to the targeted ions. Satisfactory and stable detection sensitivities of the modified paper-based Au electrodes were obtained over several weeks even when they were bent to a radius of curvature in the range of 6.5 to 25 mm, assuming use in a flexible body patch biosensor. Moreover, the Na<superscript>+</superscript> concentration in a sweat sample was evaluated using the paper-based Au electrode with the FPS-based Na<superscript>+</superscript>-sensitive membrane in a wireless and real-time manner while the electrode was bent. Thus, owing to their complex mesh structure, flexible paper sheets should be suitable for use as potentiometric electrodes for wearable wireless biosensors. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELECTRODES
SODIUM ions
METALLIC oxides
THIN films
METALS
TANTALUM
BIOSENSORS
Subjects
Details
- Language :
- English
- ISSN :
- 14686996
- Volume :
- 21
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Science & Technology of Advanced Materials
- Publication Type :
- Academic Journal
- Accession number :
- 148654131
- Full Text :
- https://doi.org/10.1080/14686996.2020.1777463