A customizable wireless potentiostat for assessing Ni(OH)2 decorated vertically aligned MoS2 thin films for electrochemical sensing of dopamine
Järvinen, Topias; Pitkänen, Olli; Laurila, Tomi; Mannerkorpi, Minna; Saarakkala, Simo; Kordas, Krisztian (2025-01-08)
Royal society of chemistry
08.01.2025
Järvinen, T., Pitkänen, O., Laurila, T., Mannerkorpi, M., Saarakkala, S., & Kordas, K. (2025). A customizable wireless potentiostat for assessing Ni(Oh)2 decorated vertically aligned MoS2 thin films for electrochemical sensing of dopamine. Nanoscale Advances, 7(5), 1374–1383. https://doi.org/10.1039/D4NA00914B.
https://creativecommons.org/licenses/by/3.0/
© 2025 The Author(s). Published by the Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
https://creativecommons.org/licenses/by/3.0/
© 2025 The Author(s). Published by the Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
https://creativecommons.org/licenses/by/3.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202501281366
https://urn.fi/URN:NBN:fi:oulu-202501281366
Tiivistelmä
Abstract
In this study, we show that on-chip grown, vertically aligned MoS2 films that are decorated with Ni(OH)2 catalyst are suitable materials to be applied as working electrodes in electrochemical sensing. The constructed sensors display a highly repeatable response to dopamine, used as a model analyte, in a large dynamic range from 1 μM to 1 mM with a theoretical detection limit of 0.1 μM. In addition, to facilitate practical implementation of the sensor chips, we also demonstrate a low power wireless cyber-physical system that we designed and accommodated for cyclic voltammetry measurements. The developed cost-effective and portable instrument enables straightforward data acquisition, transfer and visualization through an Android mobile interface, and has an accuracy comparable to reference analysis of our sensors using a commercial table-top laboratory potentiostat.
In this study, we show that on-chip grown, vertically aligned MoS2 films that are decorated with Ni(OH)2 catalyst are suitable materials to be applied as working electrodes in electrochemical sensing. The constructed sensors display a highly repeatable response to dopamine, used as a model analyte, in a large dynamic range from 1 μM to 1 mM with a theoretical detection limit of 0.1 μM. In addition, to facilitate practical implementation of the sensor chips, we also demonstrate a low power wireless cyber-physical system that we designed and accommodated for cyclic voltammetry measurements. The developed cost-effective and portable instrument enables straightforward data acquisition, transfer and visualization through an Android mobile interface, and has an accuracy comparable to reference analysis of our sensors using a commercial table-top laboratory potentiostat.
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