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Related Experiment Video

Updated: Mar 18, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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A novel high-temperature durable graphene temperature sensor with nano composite protective layer.

Chunlong Li1, Mingqiang Zhu1, Ancheng Ma1

  • 1School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, People's Republic of China.

Nanotechnology
|March 16, 2026
PubMed
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A new graphene temperature sensor with a silicon nitride and aluminum oxide protective layer can operate up to 600 °C. This durable sensor maintains function for hours at high temperatures, overcoming previous limitations.

Area of Science:

  • Materials Science
  • Sensor Technology
  • Nanotechnology

Background:

  • Traditional temperature sensors are limited to below 200 °C.
  • High-temperature monitoring is crucial in industries like aerospace and energy.
  • Graphene's high-temperature durability is hindered by oxidation.

Purpose of the Study:

  • To develop a graphene-based temperature sensor for high-temperature applications.
  • To enhance graphene's thermal stability using a composite protective layer.
  • To enable reliable temperature monitoring above 200 °C.

Main Methods:

  • Fabrication of a graphene sensor with a silicon nitride (SiNx) and aluminum oxide (Al₂O₃) composite protective layer.
  • Testing the sensor's performance and durability at temperatures up to 600 °C.
Keywords:
graphenehigh temperature resistanceprotective layertemperature sensor

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  • Characterizing the sensor's resistance change with temperature (positive temperature coefficient).

    • Main Results:

    • The sensor operates effectively in the range of 50-600 °C.
    • It demonstrates continuous operation for over four hours at 500 °C.
    • A maximum temperature coefficient of resistance (TCR) of 0.17% °C⁻¹ was recorded.

    Conclusions:

    • The composite protective layer successfully prevents graphene oxidation at high temperatures.
    • The developed sensor offers a wide temperature range and long-term stability.
    • This technology is promising for high-temperature industrial applications, including energy and metallurgy.