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Related Experiment Video

Updated: May 30, 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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Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation

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Reduced graphene oxide electrically contacted graphene sensor for highly sensitive nitric oxide detection.

Weiwei Li1, Xiumei Geng, Yufen Guo

  • 1Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, People's Republic of China.

ACS Nano
|August 13, 2011
PubMed
Summary

We created sensitive graphene gas sensors for detecting nitric oxide (NO) at room temperature. This technology offers a promising, scalable method for environmental and breath analysis.

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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Published on: July 3, 2025

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Nitric oxide (NO) is a critical biomarker in exhaled breath and an environmental pollutant.
  • Accurate and sensitive detection of NO gas is essential for medical diagnostics and environmental monitoring.
  • Graphene-based materials offer unique electronic properties suitable for gas sensing applications.

Purpose of the Study:

  • To develop highly sensitive and reliable graphene-based gas sensors for nitric oxide (NO) detection.
  • To fabricate novel gas sensing devices using alternating current dielectrophoresis (ac-DEP) and palladium-decorated reduced graphene oxide (Pd-RGO).
  • To evaluate the performance of the fabricated devices for NO gas detection at room temperature.

Main Methods:

  • Fabrication of graphene-based devices using alternating current dielectrophoresis (ac-DEP).
  • Utilizing palladium-decorated reduced graphene oxide (Pd-RGO) as the sensitive channel material.
  • Employing chemical vapor deposition (CVD)-grown graphene for electrode fabrication.
  • Testing the devices for nitric oxide (NO) gas detection across a concentration range of 2 to 420 ppb at room temperature.

Main Results:

  • Achieved highly sensitive, recoverable, and reliable detection of NO gas.
  • Demonstrated effective NO gas detection in the range of 2 to 420 ppb.
  • Observed response times of several hundred seconds at room temperature.
  • Confirmed the suitability of Pd-RGO and CVD-graphene for NO sensing.

Conclusions:

  • The developed graphene-based devices fabricated via ac-DEP exhibit excellent performance for NO gas detection.
  • The facile and scalable fabrication route highlights the potential of these devices for real-world applications.
  • Promising applications include monitoring human exhaled NO for disease diagnosis and detecting environmental pollutants.