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Air-stable, long-length, solution-based graphene nanoribbons.

Samuel R Peurifoy1, Qizhi Xu1, Richard May2

  • 1Department of Chemistry, Columbia University New York New York 10027 USA cn37@columbia.edu.

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Summary

Researchers developed a general strategy for creating stable, tunable graphene nanoribbons. This method uses photocyclization for air-stable, processable ribbons essential for nanoelectronic devices.

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Area of Science:

  • Nanoelectronics
  • Materials Science
  • Organic Chemistry

Background:

  • Developing electronically tunable and air-stable graphene nanoribbons is crucial for nanoelectronics.
  • Previous methods faced challenges with instability, insolubility, and low cyclization yields.

Purpose of the Study:

  • To present a general strategy for elongating graphene nanoribbon fragments into stable, processable, and electronically tunable nanoribbons.
  • To enable facile device fabrication and incorporation of graphene nanoribbons.

Main Methods:

  • Incorporation of electron-rich donor units between electron-poor perylene diimide oligomeric units.
  • Solution processing via visible-light flow photocyclization using LEDs.
  • Thermolysis of pendent side-chains to induce conductivity.

Main Results:

  • Successfully fabricated air-stable, easily processed, and electronically tunable graphene nanoribbons.
  • Demonstrated solution-castability and imaging of the nanoribbons.
  • Achieved reversible electron-accepting character in solution and stable conductivity after thermolysis.

Conclusions:

  • The presented strategy offers a mild and reliable method for fabricating tunable and ambient-stable graphene nanoribbons.
  • This work provides a straightforward route for facile device incorporation of graphene nanoribbons.