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Highly dispersible disk-like graphene nanoflakes.

Vasilios Georgakilas1, Katerina Vrettos, Katerina Katomeri

  • 1Department of Materials Science, University of Patras, 26504 Rio, Greece. viegeorgaki@upatras.gr.

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Researchers developed easily dispersible graphene nanoflakes using mild sonication and ultra-centrifugation. These disk-like nanoflakes, about 100 nm in diameter, are suitable for various applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Graphene nanoflakes are promising nanomaterials.
  • Achieving uniform size and high dispersibility remains a challenge.

Purpose of the Study:

  • To develop a scalable method for preparing disk-like graphene nanoflakes.
  • To ensure high dispersibility in organic solvents like dimethylformamide (DMF).

Main Methods:

  • Mild sonication of natural graphite in DMF overnight.
  • Purification using ultra-centrifugation.

Main Results:

  • Uniform, disk-like graphene nanoflakes with a mean diameter of approximately 100 nm were produced.
  • The nanoflakes exhibited high dispersibility in DMF.
  • The nanoflakes consisted of fewer than twenty graphene layers.

Conclusions:

  • The described method offers an efficient route to high-quality graphene nanoflakes.
  • The resulting graphene nanoflakes are well-suited for applications requiring stable dispersions.