Raman Spectroscopy of Graphene and Bilayer under Biaxial Strain: Bubbles and Balloons
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- 作者：Jakob Zabel ; Rahul R. Nair ; Anna Ott ; Thanasis Georgiou ; Andre K. Geim ; Kostya S. Novoselov ; Cinzia Casiraghi
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：February 8, 2012
- 年：2012
- 卷：12
- 期：2
- 页码：617-621
- 全文大小：257K
- 年卷期：v.12,no.2(February 8, 2012)
- ISSN：1530-6992
文摘
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.