We have some carbon dispersed in water. It has been divided into 3 parts; one settled down, one dispersed homogenously and a one layer on top the water. Which can be graphene?
We can not exactly say which layer is graphene since layers are created based on their weight (CNTs, graphene or carbon black might have similar weight). Therefore, type of nanomateirals are not distinguishable based on their weight. The best way is to characterize each layer with characterization devices such as Raman Spectra.
Morteza , I agree with u. XRD is another useful tool to judge the difference
Dear Mehdi,
You cannot distinguish the graphene on this basis. Better go for AFM for its high spatial resolution or Raman Spectroscopy - number of bands, 3 major bands in case of graphene that is D-,G- and 2D-band (Raman image also possible) or Transmission electron microscopy (TEM) - to observe the number of layers.
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