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Related Experiment Video

Updated: May 24, 2026

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
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High sensitivity gas detection using a macroscopic three-dimensional graphene foam network.

Fazel Yavari1, Zongping Chen, Abhay V Thomas

  • 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180-3590, USA.

Scientific Reports
|February 23, 2012
PubMed
Summary
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This study introduces a novel 3D graphene foam for highly sensitive and reliable room-temperature gas sensing. This durable, flexible material offers an affordable alternative to traditional sensors, detecting ammonia and nitrogen dioxide at parts-per-million levels.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Sensing

Background:

  • Individual nanostructures offer high gas-sensing sensitivity but are complex and unreliable.
  • Conventional sensors are reliable but lack room-temperature sensitivity.

Purpose of the Study:

  • To develop a novel gas sensor combining high sensitivity and reliability.
  • To create a macro-scale, 3D graphene foam for efficient gas detection.

Main Methods:

  • Fabrication of a macro graphene foam with few-layer graphene walls.
  • Room-temperature gas sensing experiments for ammonia (NH3) and nitrogen dioxide (NO2).
  • Utilizing Joule-heating for sensor regeneration and low-power operation.

Main Results:

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  • Demonstrated parts-per-million level detection of NH3 and NO2 at room temperature.
  • The 3D graphene foam exhibited high sensitivity and mechanical robustness.
  • Achieved fully reversible sensing with low-power operation via Joule-heating.

Conclusions:

  • The developed 3D graphene foam sensor offers a promising solution for sensitive, reliable, and affordable gas detection.
  • This material overcomes limitations of both individual nanostructures and conventional sensors.
  • The sensor's properties make it suitable for practical, low-power, and durable gas-sensing applications.