Raman spectroscopy on etched graphene nanoribbons

Details Raman spectroscopy on etched graphene nanoribbons Raman spectroscopy on etched graphene nanoribbons

2011-05-05

arxiv.org/abs/1105.1001v1

J. Appl. Phys. 109, 073710 (2011);

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1063/1.3561838

We investigate etched single-layer graphene nanoribbons with different widths ranging from 30 to 130 nm by confocal Raman spectroscopy. We show that the D-line intensity only depends on the edge-region of the nanoribbon and that consequently the fabrication process does not introduce bulk defects. In contrast, the G- and the 2D-lines scale linearly with the irradiated area and therefore with the width of the ribbons. We further give indications that the D- to G-line ratio can be used to gain information about the crystallographic orientation of the underlying graphene. Finally, we perform polarization angle dependent measurements to analyze the nanoribbon edge-regions.

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