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Microbial biofilms for self-powered noncontact sensing.

Yongji Ma1, Bin Li2, Guoping Ren1

  • 1College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.

Biosensors & Bioelectronics
|December 26, 2023
PubMed
Summary

Researchers developed simple self-powered noncontact sensors (SNSs) using microbial biofilms. These biofilm sensors offer a sustainable, self-healing alternative for human-machine interfaces, achieving a record sensing range.

Keywords:
Health monitoringMicrobial biofilmNoncontact sensorSelf-poweredSpace locating

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Area of Science:

  • Biomaterials Science
  • Sensor Technology
  • Human-Machine Interfaces

Background:

  • Noncontact sensing is crucial for intelligent human-machine interfaces, but current inorganic material-based sensors face limitations like material scarcity, power dependency, and poor energy generation.
  • Existing technologies struggle with practical application due to these inherent drawbacks.

Purpose of the Study:

  • To develop simple, self-powered noncontact sensors (SNSs) utilizing microbial biofilms as a core component.
  • To explore the potential of biofilm-based sensors for advanced human-machine interface applications.

Main Methods:

  • Fabrication of self-powered noncontact sensors (SNSs) using Geobacter sulfurreducens biofilms.
  • Characterization of sensor performance, including voltage output, current, and sensing range.
  • Demonstration of sensor applications in monitoring human breathing and localizing electric fields.

Main Results:

  • The developed biofilm SNSs exhibited excellent self-powered sensing with a maximum voltage of 10 V and current of 60 nA.
  • Achieved a maximum sensing range of 40 cm, the farthest reported to date for such sensors.
  • Demonstrated effective human breathing monitoring and electric field localization using sensor arrays.

Conclusions:

  • Microbial biofilms offer significant advantages over traditional inorganic materials, including wide availability, self-proliferation, low cost, eco-friendliness, and rapid self-healing.
  • The proposed biofilm SNSs present a novel approach for noncontact power generation from biomaterials and enable self-driven sensing applications.