Hello everyone, we have deposited thin films of carbon under vacuum from a hydrocarbon gas, the analysis of these coating with RAMAN technique give the following spectra, if someone can help us to interpret it thank you.
This Intensity pattern(s) is same as CVD grown Few Layer Graphene (FLG), In the pattern B, first peak (D- peak) indicates the measure of purity of graphene layer; Perfect Graphene with ideal hexagon should not show "D- peak ". Second peak (G-peak) is the characteristic for sp^2 hybridized carbon and Third peak (2D- peak) determines the number of layers of FLG, it broadens up together with achieving lesser and lesser height as the number of layers increase.
The spectra shows the presence of G-Band and D-band and the absence of 2D-band. The shape of the 2D band provide distinction between Graphite vs. Graphene (See Fig 1 in the link below) as well as the number of Graphene layers (see Fig 4). The position and the intensity of the G-band reflects the number of layers of Graphene (See Fig 2 & Fig 3 in the link). The intensity ratio of 2D band compared with G-band allows to identify the presence of the single layer Graphene (see Fig ). Figures mentioned are referred to the following link: https://www.azom.com/article.aspx?ArticleID=6271
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