Probing the Nature of Defects in Graphene by coupling the experimental and calculated Raman Spectra

ORAL

Abstract

In this study, we experimentally create different defects density using plasma sputtering with different power on CVD graphene on the SiO2 substrate and the epitaxial graphene grown on the SiC substrate [1]. The measured Raman spectra show the characteristic bands of defective and disordered graphene. Furthermore, we calculate the non-resonant Raman spectra of graphene with different diameters of vacancies and randomly distributed. The experimental and calculated spectra allowed us to identify the Raman modes characteristic of the size of the vacancies. Based on these findings, Raman spectroscopy can be improved to determine the size and type of defects, and these works open ways to control defects in 2D Materials.

*This work has been supported by OCP project grant AS70, "Towards phosphorene-based materials and devices,” and by the support of the Chair "Multiphysics and HPC" led by the Mohammed VI Polytechnic University, sponsored by OCP.

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Publication: Abdel El Fatimy, Peize Han, Nicholas Quirk, Luke St. Marie, Matthew T. Dejarld, Rachael L. Myers-Ward, Kevin Daniels, Shojan Pavunny, D. Kurt Gaskill, Yigit Aytac, Thomas E. Murphy and Paola Barbara, Effect of defect induced cooling on graphene hot electron bolometers, Carbon, 154, 497-502, (2019).

Presenters

  • AIT ABDELKADER Sidi abdelmajid

    • Mohammed VI Polytechnic University

Authors

  • AIT ABDELKADER Sidi abdelmajid

    • Mohammed VI Polytechnic University

  • Ismail Benabdallah

    • Institute of Applied Physics, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco.
    • Mohammed VI Polytechnic University

  • Kurt Gaskill

    • U.S. Naval Research Laboratory

  • Petr Neugebauer

    • brno university of Technology, CEITEC
    • Central European Institute of Technology, CEITEC BUT, Purkynova 656/123, Brno 61200, Czech Republic
    • Central European Institute of Technology
    • CEITEC, Brno University of Technology

  • Abdelouahad El Fatimy

    • Institute of Applied Physics, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, Ben Guerir, 43150, Morocco.
    • Mohammed VI Polytechnic University