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Portable and Autonomous PEDOT-Modified Flexible Paper-Based Methanol Fuel Cell Sensing Platform Applied to L1CAM
Liliana P T Carneiro1,2,3, Alexandra M F R Pinto3,4, Dzmitry Ivanou4,5
1BioMark, Sensor Research@UC/CEB, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Rua Sílvio Lima, Pólo II, Coimbra 3030-790, Portugal.
ACS Applied Polymer Materials
|March 28, 2024
Summary
This study introduces a novel paper-based direct methanol fuel cell (DMFC) that doubles as a biosensor and powers an electrochromic cell for colorimetric detection. This autonomous device is ideal for point-of-care diagnostics in low-resource settings.
Area of Science:
- * Materials Science and Engineering
- * Electrochemistry
- * Biomedical Engineering
Background:
- * Direct methanol fuel cells (DMFCs) offer a portable energy solution.
- * Biosensors are crucial for diagnostics, but often require external power.
- * Integrating energy generation and sensing can enable point-of-care applications.
Purpose of the Study:
- * To develop an autonomous, paper-based biosensor powered by a DMFC.
- * To integrate the DMFC/biosensor with an electrochromic cell for visual readout.
- * To demonstrate the device's utility for detecting biomarkers in resource-limited environments.
Main Methods:
- * Fabrication of a 5-stack poly(3,4-ethylenedioxythiophene)-modified paper DMFC (PEDOT/PB-DMFC).
- * Development of an electrochromic cell (EC) on treated baking paper.
- * Electropolymerization of 3,4-ethylenedioxythiophene (EDOT) in the presence of L1CAM to create the biosensor layer on the DMFC anode.
- * Characterization of DMFC performance and biosensor calibration.
Main Results:
- * The PEDOT/PB-DMFC stack achieved 1.5-1.6 V with 0.5 M methanol.
- * The biosensor demonstrated linear responses for L1CAM from 1.0 × 10-12 to 1.0 × 10-8 M, with a detection limit of 1.17 × 10-13 M.
- * Coupling with the EC resulted in an observable color gradient corresponding to the biosensor response.
Conclusions:
- * A self-powered, paper-based biosensor system for L1CAM detection was successfully developed.
- * The integrated DMFC/biosensor/EC device offers a visual readout suitable for point-of-care applications.
- * This technology holds promise for diagnostics in areas with limited energy access and provides an alternative to conventional energy demands.
