The effect of substrates on the Raman spectrum of graphene: Graphene-on-sapphire and graphene-on-glass

The authors investigated the influence of substrates on Raman scattering spectrum from graphene. The room-temperature Raman signatures from graphene layers on GaAs, sapphire, and glass substrates were compared with those from graphene on the standard Si ∕ Si O 2 ( 300 nm ) substrate, which served as...

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Bibliographic Details
Published in:Applied physics letters 2007-11, Vol.91 (20), p.201904-201904-3
Main Authors: Calizo, Irene, Bao, Wenzhong, Miao, Feng, Lau, Chun Ning, Balandin, Alexander A.
Format: Article
Language:English
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Summary:The authors investigated the influence of substrates on Raman scattering spectrum from graphene. The room-temperature Raman signatures from graphene layers on GaAs, sapphire, and glass substrates were compared with those from graphene on the standard Si ∕ Si O 2 ( 300 nm ) substrate, which served as a reference. It was found that while G peak of graphene on Si ∕ Si O 2 and GaAs is positioned at 1580 cm − 1 , it is downshifted by ∼ 5 cm − 1 for graphene on sapphire and, in some cases, splits into doublets for graphene on glass with the central frequency around 1580 cm − 1 . The obtained results are important for nanometrology of graphene and graphene-based devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2805024