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Related Experiment Video

Updated: May 17, 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-performance NO2 sensors based on chemically modified graphene.

Wenjing Yuan1, Anran Liu, Liang Huang

  • 1Department of Chemistry, Tsinghua University, Beijing, PR China.

Advanced Materials (Deerfield Beach, Fla.)
|November 10, 2012
PubMed
Summary

Chemically modified graphene (CMG) enhances nitrogen dioxide (NO2) gas sensors. These novel sensors show significantly higher sensitivity and selectivity than traditional reduced graphene oxide (rGO) sensors.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Sensor Technology

Background:

  • Reduced graphene oxide (rGO) is a promising material for gas sensing applications.
  • Developing high-performance gas sensors with improved sensitivity and selectivity remains a key challenge.

Purpose of the Study:

  • To synthesize and characterize chemically modified graphene (CMG) materials.
  • To fabricate and evaluate the performance of NO2 gas sensors based on CMGs.

Main Methods:

  • Covalent grafting of reduced graphene oxide (rGO) sheets with sulfophenyl or ethylenediamine groups.
  • Fabrication of gas sensors using the synthesized CMG materials.
  • Testing sensor performance including sensitivity, selectivity, and repeatability for NO2 detection.

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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Last Updated: May 17, 2026

Manufacturing of a Nafion-coated, Reduced Graphene Oxide/Polyaniline Chemiresistive Sensor to Monitor pH in Real-time During Microbial Fermentation
11:18

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

Published on: January 7, 2019

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Published on: February 1, 2022

Main Results:

  • Chemically modified graphene (CMG) was successfully synthesized.
  • NO2 sensors based on CMGs demonstrated 4 to 16 times higher sensitivity compared to rGO-based sensors.
  • The CMG sensors exhibited excellent selectivity and repeatability without requiring UV-light or thermal treatment.

Conclusions:

  • Covalent modification of rGO with specific functional groups significantly enhances gas sensing performance.
  • CMG-based sensors offer a promising alternative for high-performance, low-power NO2 detection.
  • The developed CMG materials pave the way for advanced chemical sensor applications.