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Raman Spectroscopy of Graphene Edges
- Source :
- Nano Lett., 9, 1433 (2009)
- Publication Year :
- 2008
-
Abstract
- Graphene edges are of particular interest, since their chirality determines the electronic properties. Here we present a detailed Raman investigation of graphene flakes with well defined edges oriented at different crystallographic directions. The position, width and intensity of G and D peaks at the edges are studied as a function of the incident light polarization. The D-band is strongest for light polarized parallel to the edge and minimum for perpendicular orientation. Raman mapping shows that the D peak is localized in proximity of the edge. The D to G ratio does not always show a significant dependence on edge orientation. Thus, even though edges can appear macroscopically smooth and oriented at well defined angles, they are not necessarily microscopically ordered.
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Nano Lett., 9, 1433 (2009)
- Publication Type :
- Report
- Accession number :
- edsarx.0810.5358
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1021/nl8032697