Spatiotemporal Electrochemistry on Flexible Microelectrode Arrays: Progress Towards Smart Contact Lens Integration
| Autor: | Eva González-Fernández, Matthew Donora, Herbert De Smet, Ian Underwood, Andres Vasquez Quintero |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Analyte
Auxiliary electrode Materials science Instrumentation Electrochemical methods 02 engineering and technology 010402 general chemistry 01 natural sciences Materials Chemistry Electrical and Electronic Engineering chemistry.chemical_classification business.industry Metals and Alloys Polymer Multielectrode array 021001 nanoscience & nanotechnology Condensed Matter Physics Flexible microelectrodes 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Contact lens Microelectrode chemistry Electrode Optoelectronics Wearable sensors 0210 nano-technology business Smart Contact Lenses Spatiotemporal Electrochemistry |
| Zdroj: | Donora, M, González-Fernández, E, Quintero, A V, de Smet, H & Underwood, I 2019, ' Spatiotemporal Electrochemistry on Flexible Microelectrode Arrays: Progress Towards Smart Contact Lens Integration ', Sensors and Actuators B: Chemical, vol. 296, 126671 . https://doi.org/10.1016/j.snb.2019.126671 |
| DOI: | 10.1016/j.snb.2019.126671 |
| Popis: | We demonstrate a real-speed spatiotemporal electrochemical map showing both time- and position-varying concentration of an analyte in contact with a flexible microelectrode array. A polymer-based device of 11 μm in thickness comprising patterned gold metallisation on a polyimide substrate was fabricated, with eight individually addressable working electrodes (diameter 30 μm) and an integrated counter electrode. We performed a repeated sequence of high-speed chronoamperometric measurements at each electrode and processed the data to generate a spatiotemporal concentration map, in which a number of fluid effects, including bulk flow, diffusive mixing and homogenisation of two miscible fluids of different concentration were observed. This device was fabricated using processes compatible with an existing smart contact lens platform, with a view to develop integrated sensors in future work. We believe this technique has significant potential in the field of electrochemical smart contact lenses, both in introducing new functionality and in improving our ability to draw accurate and clinically-relevant conclusions from measurements made in the tear film. |
| Databáze: | OpenAIRE |
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