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Rapid Characterization of Bacterial Electrogenicity Using a Single-Sheet Paper-Based Electrofluidic Array.

Yang Gao1, Daniel J Hassett2, Seokheun Choi1

  • 1Department of Electrical and Computer Engineering, Binghamton University, State University of New York, Binghamton, NY, United States.

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Summary

Researchers developed a novel paper-based sensor to rapidly measure bacterial electrogenicity. This technology enables quick assessment of electricity-generating bacteria, advancing sustainable applications like biofuels and wastewater treatment.

Keywords:
biosensing arrayselectrogenicityelectromicrobiologyexoelectrogensextracellular electron transfermicrobial fuel cellspaper-based devices

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Area of Science:

  • Biotechnology and Bioengineering
  • Environmental Science
  • Materials Science

Background:

  • Bacterial electrogenicity, or electron transfer capacity, is key for sustainable technologies like biofuels and wastewater treatment.
  • Synthetic biology offers potential to enhance microbial electron transfer pathways and electrogenic potential.
  • A need exists for rapid, sensitive, and high-throughput methods to evaluate bacterial electrogenicity.

Purpose of the Study:

  • To develop a novel, paper-based electrofluidic screening platform for rapid and sensitive characterization of bacterial electrogenicity.
  • To integrate electronic and fluidic functionalities onto a single paper substrate for efficient bacterial analysis.

Main Methods:

  • Utilized a wax printer for hydrophobic patterning on paper.
  • Employed a water-dispersed conductive polymer (poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) for integrated electronics.
  • Engineered a 3-D, microporous, hydrophilic, and conductive paper structure for enhanced electron transfer.

Main Results:

  • The paper-based sensor enabled rapid (within 20 minutes) and sensitive power assessment of electrogenic bacteria from microliter volumes.
  • Successfully characterized five isogenic mutants of *Pseudomonas aeruginosa*, distinguishing their electrogenic capacities.
  • Demonstrated the platform's effectiveness in evaluating genetically engineered bacterial strains.

Conclusions:

  • The developed paper-based electrofluidic platform offers a promising solution for high-throughput screening of bacterial electrogenicity.
  • This technology can accelerate advancements in sustainable applications by enabling rapid characterization of electrogenic bacteria.
  • The sensor's design facilitates efficient electron transfer and sensitive power measurement, validating its utility with engineered bacterial strains.