Determination of edge purity in bilayer graphene using μ-Raman spectroscopy

Milan Begliarbekov, Onejae Sul, Sokratis Kalliakos, Eui Hyeok Yang, Stefan Strauf

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Abstract

Polarization resolved μ -Raman spectroscopy was carried out at the edges of bilayer graphene. We find strong dependence of the intensity of the G band on the incident laser polarization, with its intensity dependence being 90° out of phase for the armchair and zigzag case, in accordance with theoretical predictions. For the case of mixed-state edges we demonstrate that the polarization contrast reflects the fractional composition of armchair and zigzag edges, providing a monitor of edge purity, which is an important parameter for the development of efficient nanoelectronic devices.

Original languageEnglish
Article number031908
JournalApplied Physics Letters
Volume97
Issue number3
DOIs
StatePublished - 19 Jul 2010

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