Abstract
We explore glucose sensitivity as a function of pH in the electrochemical non-enzymatic sensor. The employed sensor consisted of a Cu/CuO working electrode, an Ag/AgCl reference electrode, and a graphite counter electrode. A minimum pH value of 12.5 was determined for glucose sensing in the 0–8 mM range, and the maximum glucose sensitivity of 304 µA/mMcm2 was obtained at a pH of 13. The pH sensing capabilities of the system were also explored to determine its viability as a correction variable for glucose detection with the sample's pH, obtaining a pH sensitivity of 40 mV/pH in the 11.0–13.5 range.
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Acknowledgments
The authors thank CONAHCYT for funding the research, project FORDECYT No. 297497 and No. 312048 (LANITEM). The authors are grateful for the facilities granted using CONMAD CIDESI’s infrastructure.
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CONAHCYT financially supports this work with the projects FORDECYT No. 297497 and No. 312048 (LANITEM).
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PT: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing—original draft, review & editing; DD: Conceptualization, Funding acquisition, Project administration, Project administration, Resources, Supervision, Validation, Visualization, Writing—original draft, review & editing. AC: Conceptualization, Funding acquisition, Methodology, Project administration, Project administration, Resources, Supervision; JA & IRC-U: Conceptualization, Data curation, Investigation, Methodology, Project administration, Resources, Supervision, Validation, Writing—original draft, review & editing; G. Olayo: Methodology, Resources, review & editing; J-AM: Methodology, Resources, review & editing; GM: Methodology, review & editing.
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Tirado Cantu, P., Alcantar Peña, J., Cruz Zabalegui, A. et al. Simultaneous pH and glucose sensing and its relation in a non-enzymatic glucose sensor. MRS Communications 14, 96–102 (2024). https://doi.org/10.1557/s43579-023-00506-3
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DOI: https://doi.org/10.1557/s43579-023-00506-3