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. 2021 Jan 7;11(1):16. doi: 10.3390/bios11010016

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Calibration curve for the self-powered detection of glucose (n = 3) in a membrane-less cell configuration, using the optimized electrodes and a 10 kΩ resistor setting. The calibration curve can be well described using a Michaelis–Menten law and used across a broad glucose concentration range (A), with parameters J_max = (165.9 ± 1.6) µA cm⁻², K_m = (2.67 ± 0.06) mM. A conventional linear calibration can also be used for selected ranges, such as the low concentrations shown in panel (B).