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    Area of Science:

    • Biotechnology
    • Microbiology
    • Paper-based electronics (Papertronics)

    Background:

    • Microbial fuel cells (MFCs) offer a sustainable energy source.
    • Rapid screening of electroactive microorganisms is crucial for advancements in MFC technology.
    • Existing methods for microbial characterization can be costly and time-consuming.

    Purpose of the Study:

    • To develop a low-cost, disposable, and fully-papertronic screening platform for electroactive microorganisms.
    • To enable simultaneous characterization of multiple engineered bacterial strains.
    • To integrate microbial fuel cell technology with papertronics for rapid microbial analysis.

    Main Methods:

    • Fabrication of a papertronic device with 64 spatially distinct sensing units using patterned hydrophilic anodic reservoirs and hydrophobic wax boundaries.
    • Utilization of 3-D multi-laminate paper structures for device construction.
    • Engineering a conductive paper reservoir to enhance microbial electron exchange and reduce cathodic overpotential with a solid electron acceptor.

    Main Results:

    • Demonstration of a novel papertronic device for rapid screening and identification of electroactive microorganisms.
    • Successful simultaneous characterization of dozens of newly discovered, genetically engineered bacteria.
    • Instantaneous power generation achieved due to capillary forces, engineered reservoirs, and improved microbial cell attachment to electrodes.

    Conclusions:

    • The developed papertronic platform offers a low-cost and disposable solution for high-throughput screening of electroactive microorganisms.
    • This work successfully fuses microbial fuel cell technology with papertronics, opening new avenues for bioelectronic devices.
    • The platform facilitates rapid microbial sample adsorption, cell attachment, and immediate power generation, even with small sample volumes.