Mechanical exfoliation of epitaxial graphene on Ir(111) enabled by Br2 intercalation |
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Authors: | Charlotte Herbig Markus Kaiser Nedjma Bendiab Stefan Schumacher Daniel F F?rster Johann Coraux Klaus Meerholz Thomas Michely Carsten Busse |
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Institution: | II. Physikalisches Institut, Universit?t zu K?ln, K?ln, Germany. herbig@ph2.uni-koeln.de |
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Abstract: | We show here that Br(2) intercalation is an efficient method to enable exfoliation of epitaxial graphene on metals by adhesive tape. We exemplify this method for high-quality graphene of macroscopic extension on Ir(111). The sample quality and the transfer process are monitored using low-energy electron diffraction (LEED), scanning tunneling microscopy (STM), scanning electron microscopy (SEM) and Raman spectroscopy. The developed process provides an opportunity for preparing graphene of strictly monatomic thickness and well-defined orientation including the transfer to poly(ethylene terephthalate) (PET) foil. |
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