Tageldeen, MK;
Pagkalos, I;
Ghoreishizadeh, SS;
Drakakis, EM;
(2023)
Analogue circuit realisation of surface-confined redox reaction kinetics.
Biosensors and Bioelectronics
, 228
, Article 115190. 10.1016/j.bios.2023.115190.
(In press).
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Abstract
The literature on voltammetry and electrochemical impedance spectroscopy (EIS) recognises the importance of using large-amplitude sinusoidal perturbations to better characterise electrochemical systems. To identify the parameters of a given reaction, various electrochemical models with different sets of values are simulated and compared against the experimental data to determine the best-fit set of parameters. However, the process of solving these nonlinear models is computationally expensive. This paper proposes analogue circuit elements for synthesising surface-confined electrochemical kinetics at the electrode interface. The resultant analogue model could be used as a solver to compute reaction parameters as well as a tracker for ideal biosensor behaviour. The performance of the analogue model was verified against numerical solutions to theoretical and experimental electrochemical models. Results show that the proposed analogue model has a high accuracy of at least 97% and a wide bandwidth of up to 2 kHz. The circuit consumed an average power of 9 μW.
| Type: | Article |
|---|---|
| Title: | Analogue circuit realisation of surface-confined redox reaction kinetics |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.bios.2023.115190 |
| Publisher version: | https://doi.org/10.1016/j.bios.2023.115190 |
| Language: | English |
| Additional information: | © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). |
| Keywords: | AC voltammetry, Analogue accelerators, EIS, Fractional-order circuits, Surface-confined reactions, Weak inversion MOS, Kinetics, Biosensing Techniques, Oxidation-Reduction, Electrodes, Dielectric Spectroscopy |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10168116 |
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