| Autor: |
David Probst, Inyoung Lee, Jeffrey E. Dick, Koji Sode |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Sensors and Actuators Reports, Vol 5, Iss , Pp 100138- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2666-0539 |
| DOI: |
10.1016/j.snr.2023.100138 |
| Popis: |
ABSTRACT: Here, we demonstrated the application of a closed bipolar electrode to measure the change in open circuit potential (OCP) of Prussian blue/white as a function of [Cl−] concentration independently of electrode surface area. In this bipolar scheme, a potentiostat holds a constant voltage across two separate cells linked by a shared electrode that is sensitive to [Cl−] on one end and electrodeposited by Prussian blue on the other. As [Cl−] is added to the sample compartment, the ion associates with Ag+ to produce Ag/AgCl, altering the junction potential. This change is balanced electrochemically by a shift in the ratio of Prussian blue/Prussian white. A second potentiostat is used to monitor these changes over the Prussian blue electrode, yielding a for the quantification of chloride. We measured a range of 1.0 mM – 55 mM [Cl−] over various electrode surface areas, demonstrating that the signal response is independent of electrode area. Additionally, the system had the capability to translate signal across a single bipolar electrode while using differently sized electrodes in each compartment, a property that could be beneficial for microarrays or signal amplification. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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