Graphene-on-Sapphire and Graphene-on-Glass: Raman Spectroscopy Study

Details Graphene-on-Sapphire and Graphene-on-Glass: Raman Spectroscopy Study Graphene-on-Sapphire and Graphene-on-Glass: Raman Spectroscopy Study

2007-10-12

arxiv.org/abs/0710.2369v1

Appl. Phys. Lett. 91, 201904 (2007)

Physics

Condensed Matter

Materials Science

Accepted for publication in Applied Physics Letters, 9 pages, 3 figures

Scientific paper

10.1063/1.2805024

The room-temperature Raman signatures from graphene layers on sapphire and glass substrates were compared with those from graphene on GaAs substrate and on the standard Si/SiO2 substrate, which served as a reference. It was found that while G peak of graphene on Si/SiO2 and GaAs is positioned at 1580 cm-1 it is down-shifted by ~5 cm-1 for graphene-on-sapphire (GOS) and, in many cases, splits into doublets for graphene-on-glass (GOG) with the central frequency around 1580 cm-1. The obtained results are important for graphene characterization and its proposed graphene applications in electronic devices.

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