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

2011; American Chemical Society; Volume: 12; Issue: 2 Linguagem: Inglês

10.1021/nl203359n

1530-6992

Zabel Jakob, Rahul R. Nair, Anna K. Ott, Thanasis Georgiou, A. K. Geǐm, Kostya S. Novoselov, Cinzia Casiraghi,

Carbon Nanotubes in Composites

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.