Graphene-enhanced Raman scattering on single layer and bilayers of pristine and hydrogenated graphene

0534514 - ÚFCH JH 2021 RIV GB eng J - Journal Article
Valeš, Václav - Drogowska-Horna, Karolina A. - Guerra, Valentino Libero Pio - Kalbáč, Martin
Graphene-enhanced Raman scattering on single layer and bilayers of pristine and hydrogenated graphene.
Scientific Reports. Roč. 10, č. 1 (2020), č. článku 4516. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA ČR GA18-20357S; GA MŠMT(CZ) LTC18039; GA MŠMT(CZ) LTAUSA19001; GA MŠMT(CZ) LM2015073; GA MŠMT(CZ) EF16_013/0001821
Grant - others:GA MŠk(CZ) CZ.02.1.01/0.0/0.0/16_013/0001821
Institutional support: RVO:61388955
Keywords : grown graphene * induced strain * spectroscopy * surface * substrate * molecules * sers
OECD category: Physical chemistry
Impact factor: 4.380, year: 2020
Method of publishing: Open access

Graphene-enhanced Raman scattering (GERS) on isotopically labelled bilayer and a single layer of pristine and partially hydrogenated graphene has been studied. The hydrogenated graphene sample showed a change in relative intensities of Raman bands of Rhodamine 6G (R6G) with different vibrational energies deposited on a single layer and bilayer graphene. The change corresponds qualitatively to different doping of graphene in both areas. Pristine graphene sample exhibited no difference in doping nor relative intensities of R6G Raman peaks in the single layer and bilayer areas. Therefore, it was concluded that strain and strain inhomogeneities do not affect the GERS. Because of analyzing relative intensities of selected peaks of the R6G probe molecules, it is possible to obtain these results without determining the enhancement factor and without assuming homogeneous coverage of the molecules. Furthermore, we tested the approach on copper phtalocyanine molecules.
Permanent Link: http://hdl.handle.net/11104/0312699