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"Snowing" Graphene using Microwave Ovens.

Yangyong Sun1, Liangwei Yang1, Kailun Xia2

  • 1Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.

Advanced Materials (Deerfield Beach, Fla.)
|August 23, 2018
PubMed
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A novel, scalable microwave-assisted process synthesizes high-quality graphene flakes at low cost. This "snowing" method is catalyst-free, substrate-free, and yields 3D graphene architectures for advanced strain sensors.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Conventional graphene production methods like chemical vapor deposition and liquid-phase exfoliation face limitations in cost, scalability, and quality.
  • These limitations hinder the widespread industrial adoption of graphene for various applications.

Purpose of the Study:

  • To develop a simple, cost-effective, and scalable method for producing high-quality graphene.
  • To explore the potential of the synthesized graphene in strain sensing applications.

Main Methods:

  • Utilizing corona discharge of SiO2/Si in a household microwave oven at ambient pressure.
  • A catalyst-free and substrate-free "snowing" process to synthesize graphene flakes.
  • Fabrication of 3D graphene architectures from the synthesized flakes.
Keywords:
corona dischargemacroscopic architecturessnowing graphenestrain sensors

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Main Results:

  • High-quality graphene flakes, including monolayers, were successfully synthesized via the "snowing" process.
  • Achieved a high yield of approximately 6.28% and a production rate of up to 0.11 g/h.
  • Demonstrated the utility of the 3D graphene architectures in strain sensors, achieving high sensitivity (gauge factor ≈ 171.06) and a wide strain range (0%-110%).

Conclusions:

  • The developed microwave-assisted "snowing" process offers a facile, scalable, and low-cost route to high-quality graphene.
  • The synthesized 3D graphene architectures exhibit excellent performance in strain sensing.
  • This strategy holds promise for the scalable production of other 2D materials for diverse applications.