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Electrochemical Pixels: Semi-open electrochemical cells with a vertically stacked design
Marc Clua Estivill1, Jhonattan F Baez1, Pascal Blondeau1
1Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007, Tarragona, Spain.
Biosensors & Bioelectronics
|December 2, 2023
Summary
A novel electrochemical cell design enables self-powered detection of analytes like hydrogen peroxide and glucose. This "electrochemical pixel" technology paves the way for low-cost, simple biochemical sensing arrays.
Area of Science:
- Electrochemistry
- Materials Science
- Sensor Technology
Background:
- Traditional electrochemical sensors often require complex configurations and external power sources.
- Developing integrated, self-powered electrochemical devices is crucial for portable and low-cost diagnostics.
Purpose of the Study:
- To present a novel, vertically stacked electrochemical cell design.
- To demonstrate a standalone electrochemical cell with an internal reference electrode.
- To showcase its application in self-powered detection of analytes and development of sensing arrays.
Main Methods:
- Fabrication of a layered structure comprising a macroporous working electrode, polyelectrolyte, and metallic conductor.
- Utilizing a paper-based platinum electrode and Nafion as the polyelectrolyte.
- Operating the device in capacitive, self-powered current (fuel cell emulation), and potential-current switched modes.
- Demonstrating analyte detection (hydrogen peroxide, glucose) and array fabrication.
Main Results:
- Successful construction of a standalone electrochemical cell with an integrated reference electrode.
- Demonstration of self-powered detection of hydrogen peroxide.
- Validation of multiple operating modes including capacitive and fuel cell emulation.
- Successful detection of glucose using an array of the developed sensors.
Conclusions:
- The novel electrochemical cell design functions as an "electrochemical pixel."
- The device enables simple, low-cost, and self-powered biochemical sensing.
- This work lays the foundation for next-generation electrochemical sensing arrays.
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