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Related Experiment Video

Updated: Jun 1, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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Large-area graphene films by simple solution casting of edge-selectively functionalized graphite.

Seo-Yoon Bae1, In-Yup Jeon, Jieun Yang

  • 1Interdisciplinary School of Green Energy and Institute of Advanced Materials and Devices, Ulsan National Institute of Science and Technology (UNIST), 100, Banyeon, Ulsan 689-798, South Korea.

ACS Nano
|May 20, 2011
PubMed
Summary

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Edge-selective functionalization of graphite (EFG) enables scalable production of uniform graphene films. Solution processing yields conductive, transparent, and flexible films for practical applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Graphene films are promising for electronics due to their unique properties.
  • Scalable and cost-effective production methods for high-quality graphene films remain a challenge.
  • Current methods often involve complex processes or result in non-uniform films.

Purpose of the Study:

  • To develop a scalable method for producing large-area uniform graphene films.
  • To demonstrate the utility of edge-selective functionalization of graphite (EFG) for graphene film fabrication.
  • To characterize the electrical and optical properties of the resulting graphene films.

Main Methods:

  • Edge-selective functionalization of graphite (EFG) was employed.
  • EFG dispersions in dichloromethane were solution-cast onto silicon oxide substrates.

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Published on: February 1, 2022

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  • Subsequent annealing was performed to form graphene films.

    • Main Results:

    • Large-area uniform graphene films were successfully produced.
    • The films exhibited ambipolar transport properties.
    • Sheet resistances ranged from 0.52-3.11 kΩ/sq with 63-90% optical transmittance.
    • The films demonstrated electrical conductivity, optical transparency, and mechanical robustness.

    Conclusions:

    • EFG is an effective method for producing high-quality graphene films.
    • Solution processing via EFG enables scalable manufacturing of functional graphene films.
    • The developed graphene films are suitable for flexible electronic applications.