Raman 2D-band splitting in graphene: Theory and experiment

Otakar Frank, Marcel Mohr, Janina Maultzsch, Christian Thomsen, Ibtsam Riaz, Rashid Jalil, Kostya S. Novoselov, Georgia Tsoukleri, John Parthenios, Konstantinos Papagelis, Ladislav Kavan, Costas Galiotis

    Research output: Contribution to journalArticlepeer-review


    We present a systematic experimental and theoretical study of the two-phonon (2D) Raman scattering in graphene under uniaxial tension. The external perturbation unveils that the 2D mode excited with 785 nm has a complex line-shape mainly due to the contribution of two distinct double resonance scattering processes (inner and outer) in the Raman signal. The splitting depends on the direction of the applied strain and the polarization of the incident light. The results give new insight into the nature of the 2D band and have significant implications for the use of graphene as reinforcement in composites since the 2D mode is crucial to assess how effectively graphene uptakes an applied stress or strain. © 2011 American Chemical Society.
    Original languageEnglish
    Pages (from-to)2231-2239
    Number of pages8
    JournalACS Nano
    Issue number3
    Publication statusPublished - 22 Mar 2011


    • 2D mode
    • graphene
    • Raman spectroscopy
    • tensile strain


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