Dear colleagues,
I have some Raman spectra that puzzle me - we did some coating with a hexane-Ar plasma on glass. Thus, I think the films are surely (hydro)carbon films. The Raman spectra we took show only three peaks (so, the glass substrate is neatly covered). My problem now is that I have troubles identifying these peaks, except for the one at 1344 /cm, which is the first order D peak of graphite in my opinion. But there are two more peaks, a quite sharp one at 1541 /cm and a broad one at 2853 /cm. The only value I could find in the literature so far for the former one would be single carbon nano tubes but this is not supported by SEM microscopy and for the latter one I have no clue. Maybe some Raman expert could help me with the identifaction. I attached a spectrum to have a look. The parameters of the measurement were: 1.6 mW Laser power at 532 nm.
Most likely C-H related modes. See for example doi:10.1139/v64-049
Hope this helps.
Karsten
Karsten Fleischer
Hi Karsten,
thanks for the paper - I agree that the 2853 /cm band could be a slightly shifted 2852 /cm -(CH2)3- symmetric C-H stretching mode but I couldn't find any information about the quite prominent peak at 1541 /cm in the paper you sent me, do you have any clue about that one?
thanks a lot
Johannes
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