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Paper-based microfluidic biofuel cell operating under glucose concentrations within physiological range.

Maria José González-Guerrero1, F Javier Del Campo1, Juan Pablo Esquivel2

  • 1Instituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Campus de la Universidad Autónoma de Barcelona (Esfera UAB), Bellaterra, 08193 Barcelona, España.

Biosensors & Bioelectronics
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Summary
This summary is machine-generated.

This study developed a compact paper-based fuel cell for glucose detection. It generates usable energy from small blood samples, powering sensors for in-vitro diagnostics.

Keywords:
EnzymaticMicrofluidicPaper-based biofuel cell

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Area of Science:

  • Biomedical Engineering
  • Electrochemistry
  • Microfluidics

Background:

  • Enzymatic fuel cells offer a promising avenue for powering micro-devices.
  • Miniaturization is key for developing portable diagnostic tools.
  • Efficient energy generation from biological samples is crucial for point-of-care applications.

Purpose of the Study:

  • To develop a compact, paper-based enzymatic microfluidic fuel cell for glucose detection.
  • To explore the energy generation capabilities of the fuel cell using physiological glucose concentrations.
  • To assess the potential of this device for powering sensors and analysis equipment.

Main Methods:

  • Construction of a paper-based fuel cell using carbon paper electrodes and a microfluidic casing.
  • Utilizing glucose dehydrogenase and bilirubin oxidase as anode and cathode catalysts, respectively.
  • Employing osmium-based mediators for enhanced electron transfer.
  • Testing the fuel cell's performance with varying glucose concentrations (2.5-30mM) at physiological pH (7.4).

Main Results:

  • The fuel cell demonstrated a linear power output response to glucose.
  • Power densities ranged from 20 to 90 µWcm⁻².
  • The device operated effectively with a small sample volume (≈35µl).

Conclusions:

  • The developed paper-based fuel cell is capable of generating electrical energy from glucose in a manner suitable for in-vitro diagnostic applications.
  • The device's compact nature and low sample volume requirement make it ideal for portable sensing platforms.
  • The quantified energy output suggests potential for powering various micro-devices and sensors.