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- Raman Signatures of Single Layer Graphene Dispersed in Degassed Water, “‘Eau de Graphene”’ doi link

Auteur(s): Bepete George, Pénicaud Alain, Drummond Carlos, Anglaret E.(Corresp.)

(Article) Publié: The Journal Of Physical Chemistry C, vol. 120 p.http://dx.doi.org/10.1021/acs.jpcc.6b07288 (2016)


Ref HAL: hal-01407045_v1
DOI: 10.1021/acs.jpcc.6b07288
WoS: 000390072100052
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15 Citations
Résumé:

We report a detailed Raman study of single layergraphene dispersed in degassed water without additives (SLGiw), so-called “‘eau de graphene”’ (EdG).23 The most characteristic signature of SLGiw is a narrow (28 ± 2 cm−1) and symmetric 2D band. The intensity of the D band is dominated by the contribution of sp3 defects due to slight functionalization of the basal-planes. The density of defects is estimated in the range 200-650 ppm by studying thin films prepared from EdG. These defects can be fully and easily cured by annealing the films at 800 °C. The position of the G and 2D bands, blue-shifted with respect to pristine SLG, are assigned to moderate biaxial compressive strain (≈0.09 ± 0.02%) and likely weak n doping (<4 × 1012 electrons/cm2) of SLGiw.