Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene

E. C. Mattson, J. E. Johns, K. Pande, R. A. Bosch, S. Cui, M. Gajdardziska-Josifovska, M. Weinert, J. H. Chen, Mark C Hersam, C. J. Hirschmugl

Research output: Contribution to journalArticle

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Abstract

We report infrared studies of adsorbed atomic oxygen (epoxide functional groups) on graphene. Two different systems are used as a platform to explore these interactions, namely, epitaxial graphene/SiC(0001) functionalized with atomic oxygen (graphene epoxide, GE) and chemically reduced graphene oxide (RGO). In the case of the model GE system, IR reflectivity measurements show that epoxide groups distort the graphene π bands around the K-point, imparting a finite effective mass and contributing to a band gap. In the case of RGO, epoxide groups are found to be present following the reduction treatment by a combination of polarized IR reflectance and transmittance measurements. Similar to the GE system, a band gap in the RGO sample is observed as well.

Original languageEnglish
Pages (from-to)212-219
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume5
Issue number1
DOIs
Publication statusPublished - Jan 2 2014

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epoxy compounds
Epoxy Compounds
Graphene
Electronic structure
graphene
electronic structure
excitation
Oxides
energy
oxides
Energy gap
Oxygen
reflectance
oxygen
Functional groups
transmittance
platforms
Infrared radiation

Keywords

  • adsorbates
  • band structure
  • epitaxial graphene
  • oxygen
  • reduced graphene oxide
  • vibrations

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Mattson, E. C., Johns, J. E., Pande, K., Bosch, R. A., Cui, S., Gajdardziska-Josifovska, M., ... Hirschmugl, C. J. (2014). Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene. Journal of Physical Chemistry Letters, 5(1), 212-219. https://doi.org/10.1021/jz4025386

Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene. / Mattson, E. C.; Johns, J. E.; Pande, K.; Bosch, R. A.; Cui, S.; Gajdardziska-Josifovska, M.; Weinert, M.; Chen, J. H.; Hersam, Mark C; Hirschmugl, C. J.

In: Journal of Physical Chemistry Letters, Vol. 5, No. 1, 02.01.2014, p. 212-219.

Research output: Contribution to journalArticle

Mattson, EC, Johns, JE, Pande, K, Bosch, RA, Cui, S, Gajdardziska-Josifovska, M, Weinert, M, Chen, JH, Hersam, MC & Hirschmugl, CJ 2014, 'Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene', Journal of Physical Chemistry Letters, vol. 5, no. 1, pp. 212-219. https://doi.org/10.1021/jz4025386
Mattson EC, Johns JE, Pande K, Bosch RA, Cui S, Gajdardziska-Josifovska M et al. Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene. Journal of Physical Chemistry Letters. 2014 Jan 2;5(1):212-219. https://doi.org/10.1021/jz4025386
Mattson, E. C. ; Johns, J. E. ; Pande, K. ; Bosch, R. A. ; Cui, S. ; Gajdardziska-Josifovska, M. ; Weinert, M. ; Chen, J. H. ; Hersam, Mark C ; Hirschmugl, C. J. / Vibrational excitations and low-energy electronic structure of epoxide-decorated graphene. In: Journal of Physical Chemistry Letters. 2014 ; Vol. 5, No. 1. pp. 212-219.
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