Raman scattering at pure graphene zigzag edges

Benjamin Krauss, P. Nemes-Incze, Viera Skakalova, L. Bíró, Klaus Von Klitzing, Jurgen H. Smet

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

Theory has predicted rich and very distinct physics for graphene devices with boundaries that follow either the armchair or the zigzag crystallographic directions. A prerequisite to disclose this physics in experiment is to be able to produce devices with boundaries of pure chirality. Exfoliated flakes frequently exhibit corners with an odd multiple of 30°, which raised expectations that their boundaries follow pure zigzag and armchair directions. The predicted Raman behavior at such crystallographic edges however failed to confirm pure edge chirality. Here, we perform confocal Raman spectroscopy on hexagonal holes obtained after the anisotropic etching of prepatterned pits using carbothermal decomposition of SiO2. The boundaries of the hexagonal holes are aligned along the zigzag crystallographic direction and leave hardly any signature in the Raman map indicating unprecedented purity of the edge chirality. This work offers the first opportunity to experimentally confirm the validity of the Raman theory for graphene edges.

Original languageEnglish
Pages (from-to)4544-4548
Number of pages5
JournalNano Letters
Volume10
Issue number11
DOIs
Publication statusPublished - Nov 10 2010

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Chirality
Graphene
Raman scattering
graphene
chirality
Raman spectra
Physics
Anisotropic etching
physics
Raman spectroscopy
flakes
Decomposition
purity
signatures
etching
decomposition
Direction compound
Experiments

Keywords

  • anisotropic etching
  • Graphene
  • Raman spectroscopy
  • zigzag edges

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Krauss, B., Nemes-Incze, P., Skakalova, V., Bíró, L., Klitzing, K. V., & Smet, J. H. (2010). Raman scattering at pure graphene zigzag edges. Nano Letters, 10(11), 4544-4548. https://doi.org/10.1021/nl102526s

Raman scattering at pure graphene zigzag edges. / Krauss, Benjamin; Nemes-Incze, P.; Skakalova, Viera; Bíró, L.; Klitzing, Klaus Von; Smet, Jurgen H.

In: Nano Letters, Vol. 10, No. 11, 10.11.2010, p. 4544-4548.

Research output: Contribution to journalArticle

Krauss, B, Nemes-Incze, P, Skakalova, V, Bíró, L, Klitzing, KV & Smet, JH 2010, 'Raman scattering at pure graphene zigzag edges', Nano Letters, vol. 10, no. 11, pp. 4544-4548. https://doi.org/10.1021/nl102526s
Krauss B, Nemes-Incze P, Skakalova V, Bíró L, Klitzing KV, Smet JH. Raman scattering at pure graphene zigzag edges. Nano Letters. 2010 Nov 10;10(11):4544-4548. https://doi.org/10.1021/nl102526s
Krauss, Benjamin ; Nemes-Incze, P. ; Skakalova, Viera ; Bíró, L. ; Klitzing, Klaus Von ; Smet, Jurgen H. / Raman scattering at pure graphene zigzag edges. In: Nano Letters. 2010 ; Vol. 10, No. 11. pp. 4544-4548.
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