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  Photon-induced oxidation of graphene/Ir(111) by SO2 adsorption

Böttcher, S., Vita, H., & Horn, K. (2015). Photon-induced oxidation of graphene/Ir(111) by SO2 adsorption. Surface Science, 641, 305-309. doi:10.1016/j.susc.2015.02.003.

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 Creators:
Böttcher, Stefan1, Author           
Vita, Hendrik1, Author           
Horn, Karsten1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: Graphene, Graphene Oxide, Functionalization, NEXAFS, XPS, ARPES, Adsorbates, Fragmentation
 Abstract: We prepare a single layer of graphene oxide by adsorption and subsequent photo-dissociation of SO2 on graphene/Ir(111). Epoxidic oxygen is formed as the main result of this process on graphene, as judged from the appearance of characteristic spectroscopic features in the C 1s and O 1s core level lines. The different stages of decomposition of SO2 into its photo-fragments are examined during the oxidation process. NEXAFS at the carbon K edge reveals a strong disturbance of the graphene backbone after oxidation and upon SO adsorption. The oxide phase is stable up to room temperature, and is fully reversible upon annealing at elevated temperatures. A band gap opening of 330 ± 60 meV between the valence and conduction bands is observed in the graphene oxide phase.

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Language(s): eng - English
 Dates: 2015-022015-02-102015-11
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.susc.2015.02.003
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 5 Volume / Issue: 641 Sequence Number: - Start / End Page: 305 - 309 Identifier: Other: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028