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Microchip-based ethanol/oxygen biofuel cell
Christine M Moore1, Shelley D Minteer, R Scott Martin
1Department of Chemistry, Saint Louis University, 3501 Laclede Ave., St. Louis, MO 63103, USA.
Lab on a Chip
|January 27, 2005
Summary
This study presents a novel microchip-based biofuel cell, addressing the need for integrated power in lab-on-a-chip systems. The device utilizes ethanol and a bioanode to generate power, demonstrating feasibility for microelectronic applications.
Area of Science:
- Electrochemistry
- Biotechnology
- Microfluidics
Background:
- Lab-on-a-chip devices require integrated power sources.
- Existing microchip technologies lack self-contained power solutions.
Purpose of the Study:
- To design and demonstrate a stackable, microchip-based biofuel cell.
- To overcome limitations in powering microelectronic devices on-chip.
Main Methods:
- Fabrication of a microchip-based biofuel cell with a flow channel.
- Modification of a carbon ink anode with poly(methylene green) and alcohol dehydrogenase.
- Electrochemical characterization of bioanode layers and the complete biofuel cell.
Main Results:
- The poly(methylene green) layer showed kinetic limitations, while the complete bioanode was diffusion-limited.
- The biofuel cell achieved maximum open circuit potentials of 0.34 V.
- Maximum current densities reached 53.0 +/- 9.1 microA cm(-2) against a platinum cathode.
Conclusions:
- The research validates the feasibility of a microfabricated biofuel cell.
- This technology offers a potential integrated power solution for lab-on-a-chip systems.
- Further optimization could enhance power output for microelectronic applications.