Raman Spectroscopy of Graphene and Bilayer under Biaxial Strain: Bubbles and Balloons

We use graphene bubbles to study the Raman spectrum of graphene under biaxial (e.g., isotropic) strain. Our Gruneisen parameters are in excellent agreement with the theoretical values. Discrepancy in the previously reported values is attributed to the interaction of graphene with the substrate. Bila...

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Bibliographic Details
Published in:Nano letters 2012-02, Vol.12 (2), p.617-621
Main Authors: Zabel, Jakob, Nair, Rahul R, Ott, Anna, Georgiou, Thanasis, Geim, Andre K, Novoselov, Kostya S, Casiraghi, Cinzia
Format: Article
Language:English
Subjects:
Balloons
Bubbles
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Graphene
Graphite - chemistry
Gruneisen parameter
Interlayers
Lattice dynamics
Membranes
Membranes, Artificial
Nanostructure
Phonons in low-dimensional structures and small particles
Physics
Raman spectroscopy
Spectrum Analysis, Raman
Strain
Surface Properties
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Summary:We use graphene bubbles to study the Raman spectrum of graphene under biaxial (e.g., isotropic) strain. Our Gruneisen parameters are in excellent agreement with the theoretical values. Discrepancy in the previously reported values is attributed to the interaction of graphene with the substrate. Bilayer balloons (intentionally pressurized membranes) have been used to avoid the effect of the substrate and to study the dependence of strain on the interlayer interactions.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl203359n