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  Revealing the ultrafast process behind the photoreduction of graphene oxide

Gengler, R. Y. N., Badali, D. S., Zhang, D., Dimos, K., Spyrou, K., Gournis, D., et al. (2013). Revealing the ultrafast process behind the photoreduction of graphene oxide. Nature Communications, 4: 2560. doi:10.1038/ncomms3560.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-8F40-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-DBEC-5
Genre: Journal Article

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http://dx.doi.org/10.1038/ncomms3560 (Publisher version)
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 Creators:
Gengler, Régis Y. N.1, 2, Author              
Badali, Daniel Salvatore1, 2, 3, Author              
Zhang, Dongfang1, 2, Author              
Dimos, Konstantinos4, Author
Spyrou, Konstantinos4, Author
Gournis, Dimitrios4, Author
Miller, R. J. Dwayne1, 2, 5, Author              
Affiliations:
1Atomically Resolved Structural Dynamics Division, Max Planck Research Department for Structural Dynamics, Department of Physics, University of Hamburg, External Organizations, ou_2173636              
2The Hamburg Center for Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany, ou_persistent22              
3International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
4Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece, ou_persistent22              
5Departments of Chemistry and Physics, University of Toronto, Toronto, Ontario, Canada, ou_persistent22              

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Free keywords: Chemical sciences; Materials science; Physical chemistry
 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.

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Language(s): eng - English
 Dates: 2013-05-312013-09-052013-10-04
 Publication Status: Published online
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1038/ncomms3560
 Degree: -

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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 4 Sequence Number: 2560 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723