You can find a very good webinar on Raman characterization of carbon materials ("Raman Characterization of Carbon Nanotubes and Carbon Materials: Obtaining Representative Measurements", 28 february 2012) on the website from Materials Today journal (http://www.materialstoday.com/webinars/). I found it very helpful, maybe it can help you too.

Adriana Urda

You can find a very good webinar on Raman characterization of carbon materials ("Raman Characterization of Carbon Nanotubes and Carbon Materials: Obtaining Representative Measurements", 28 february 2012) on the website from Materials Today journal (http://www.materialstoday.com/webinars/). I found it very helpful, maybe it can help you too.

Adriana Urda

There is a ratio between G and 2D band. See Growth of graphene from solid carbon sources Zhengzong Sun, Nature 468, 549–552 (25 November 2010) doi:10.1038/nature09579

With addition of I(2D)/I(G), deconvolution of 2D peak and FWHM(2D) more reliable.

For reference :

http://www.sciencedirect.com/science/article/pii/S0370157309000520

http://onlinelibrary.wiley.com/doi/10.1002/smll.200901173/abstract

From FTIR analysis, you can get information about functional group.

@Adriana,

Thanks a lot

Dear Uppari,

which type of graphene you are working on ? Is it CVD grown or chemical exfoliated in solution form?

For distinguishing monolayer and multilayer graphene, Raman is ofcourse and indeed an excellent tool. 2D/G ratio and FWHM of 2D band can certainly help as mentioned by Ghosh but its quite vague when u have differently oriented graphene layers.

AFM can help. Single layer graphene has 98% transmission which decreases as number of layers increase. so it also can be a method.

But it all depends on what kind of graphene, you are using.

This link is really useful,

http://www.instanano.com/characterization/experimental/raman-graphene/