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Integrated nanogenerators in biofluid.

Xudong Wang1, Jin Liu, Jinhui Song

  • 1School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA.

Nano Letters
|July 3, 2007
PubMed
Summary
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This study shows a zinc oxide nanowire nanogenerator (NG) can produce electricity in biofluid using ultrasound. Multiple NGs can boost power output for self-powered implantable devices.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Bioengineering

Background:

  • Developing self-powered systems for implantable devices is crucial.
  • Existing power sources for in-body devices face limitations.

Purpose of the Study:

  • To demonstrate a zinc oxide (ZnO) nanowire based nanogenerator (NG) capable of generating electricity within biofluid.
  • To explore methods for enhancing the output power of the NG.

Main Methods:

  • Fabrication of a prototype ZnO nanowire based nanogenerator.
  • Stimulation of the NG using ultrasonic waves in biofluid.
  • Configuring multiple NGs in parallel and serial to assess output scalability.

Main Results:

  • The NG effectively generated electricity when stimulated by ultrasonic waves in biofluid.

Related Experiment Videos

  • Connecting multiple NGs in parallel increased output current by 20-30 times (up to 35 nA for a 2 mm² device).
  • Serial connection of NGs demonstrated increased output voltage, indicating potential for higher power output through 3D integration.

    • Conclusions:

    • The feasibility of ZnO nanowire NGs for power conversion within biofluid has been unambiguously shown.
    • This technology provides a foundation for self-powering implantable and wireless nanodevices in liquid environments.
    • 3D integration and architecture offer a viable strategy for significantly increasing NG power output.