The effect of the amount of sp3 defects in graphene on the graphene enhanced Raman scattering (GERS) is studied using gradual fluorination of chemical vapour deposition grown graphene covering the Rhodamine 6G molecules. While upon a mild fluorination the GERS effect is preserved, the GERS enhancement disappears in case of a strong fluorination. After partial removal of the fluorine from the strongly fluorinated graphene by water vapor treatment, the GERS effect is restored.

V. Valeš, Z. Melníková, T. Verhagen, J. Vejpravová, M. Kalbáč: „Reversibility of Graphene-Enhanced Raman Scattering with Fluorinated Graphene“. Physica status solidi (b), 254 (2017) 1700177. https://onlinelibrary.wiley.com/doi/pdf/10.1002/pssb.201700177.