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Revealing the ultrafast process behind the photoreduction of graphene oxide

Author

Listed:
  • Régis Y. N. Gengler

    (Hamburg Center for Ultrafast Imaging, University of Hamburg)

  • Daniel S. Badali

    (Hamburg Center for Ultrafast Imaging, University of Hamburg)

  • Dongfang Zhang

    (Hamburg Center for Ultrafast Imaging, University of Hamburg)

  • Konstantinos Dimos

    (University of Ioannina)

  • Konstantinos Spyrou

    (University of Ioannina)

  • Dimitrios Gournis

    (University of Ioannina)

  • R. J. Dwayne Miller

    (Hamburg Center for Ultrafast Imaging, University of Hamburg
    University of Toronto)

Abstract

Effective techniques to reduce graphene oxide are in demand owing to the multitude of potential applications of this two-dimensional material. A very promising green method to do so is by exposure to ultraviolet irradiation. Unfortunately, the dynamics behind this reduction remain unclear. Here we perform a series of transient absorption experiments in an effort to develop and understand this process on a fundamental level. An ultrafast photoinduced chain reaction is observed to be responsible for the graphene oxide reduction. The reaction is initiated using a femtosecond ultraviolet pulse that photoionizes the solvent, liberating solvated electrons, which trigger the reduction. The present study reaches the fundamental time scale of the ultraviolet photoreduction in solution, which is revealed to be in the picosecond regime.

Suggested Citation

  • Régis Y. N. Gengler & Daniel S. Badali & Dongfang Zhang & Konstantinos Dimos & Konstantinos Spyrou & Dimitrios Gournis & R. J. Dwayne Miller, 2013. "Revealing the ultrafast process behind the photoreduction of graphene oxide," Nature Communications, Nature, vol. 4(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3560
    DOI: 10.1038/ncomms3560
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