Portable and Autonomous PEDOT-Modified Flexible Paper-Based Methanol Fuel Cell Sensing Platform Applied to L1CAM Recombinant Protein Detection.

Autor:	Carneiro LPT; BioMark, 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.; BioMark, Sensor Research@ISEP/CEB, School of Engineering, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 431, Porto 4249-015, Portugal.; CEFT, Transport Phenomena Research Center, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal., Pinto AMFR; CEFT, Transport Phenomena Research Center, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal.; AliCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal., Ivanou D; AliCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal.; LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal., Mendes AM; LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal., Sales MGF; BioMark, 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.; BioMark, Sensor Research@ISEP/CEB, School of Engineering, Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida, 431, Porto 4249-015, Portugal.
Jazyk:	angličtina
Zdroj:	ACS applied polymer materials [ACS Appl Polym Mater] 2024 Mar 11; Vol. 6 (6), pp. 3207-3221. Date of Electronic Publication: 2024 Mar 11 (Print Publication: 2024).
DOI:	10.1021/acsapm.3c02781
Abstrakt:	This work describes first a 5-stack direct methanol fuel cell (DMFC) based on poly(3,4-ethylenedioxythiophene)-modified paper (PEDOT/PB-DMFC), which acts as an energy source and biosensor, coupled to an electrochromic cell (EC). It is autonomous and monitors the biosensor response by color change, as appropriate for point-of-care (POC) applications. In detail, DMFC strips were developed from square Whatman paper, and the EC was made on baking paper treated with polydimethylsiloxane (PDMS). The PEDOT/PB-DMFCs operate in a passive mode with a few microliters of diluted methanol. The biosensor layer was obtained on the anode ink (a composite of EDOT, oxidized multiwalled carbon nanotubes, and carbon black with platinum and ruthenium) by electropolymerizing 3,4-ethylenedioxythiophene (EDOT), in situ , in the presence of L1CAM. Each PEDOT/PB-DMFC single cell generates a voltage in the range of 0.3-0.35 V depending on the cell, and a five-cell stack delivers a 1.5-1.6 V voltage range when fed with 0.5 M methanol. The fabricated PEDOT/PB-DMFC/biosensor was calibrated against L1CAM, showing linear responses from 1.0 × 10 -12 to 1.0 × 10 -8 M with a detection limit of 1.17 × 10 -13 M (single cell mode). When the EC was connected to the PEDOT/PB-DMFC device, a color gradient was observed. Overall, this work opens horizons to the use of biosensors even in places with energy scarcity and offers an alternative to reducing the current energy demand. Competing Interests: The authors declare no competing financial interest. (© 2024 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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