Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)
O 34.13: Poster
Tuesday, March 27, 2012, 18:15–21:45, Poster E
Mechanical exfoliation of epitaxial graphene on Ir(111) enabled by Br2 intercalation — •Charlotte Herbig1, Markus Kaiser2, Nedjma Bendiab3, Johann Coraux3, Klaus Meerholz2, Thomas Michely1, and Carsten Busse1 — 1II. Physikalisches Institut, Universität zu Köln, Germany — 2Institut für Physikalische Chemie, Universität zu Köln, Germany — 3Institut Néel, CNRS-UJF, France
For a technological use of graphene, it is desirable to grow it on a large scale with a reproducible high quality. The best quality up to date is achieved by growth on metal substrates. Especially on Ir(111), strictly monoatomic graphene sheets of well defined orientation and macroscopic extension are achieved [1]. For application graphene on metals is non-suitable. Therefore, a transfer is necessary. Here, we present a method for a dry transfer of graphene grown on Ir(111).
First, the epitaxially grown graphene layer was investigated by LEED and STM. Afterwards, graphene was intercalated by Br2 and examined by SEM. The transfer process was conducted by attaching adhesive tapes as supporting material and subsequent removal. Finally, the surface was analyzed by SEM. Raman spectroscopy was carried out to prove the transfer of graphene onto the adhesive tapes.
[1] R. van Gastel et al., Appl. Phys. Lett. 95 (2009) 121901