Can the band gap of Graphene be calculated using raman Spectra in case of few layer graphene flakes?

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Md.Akibul Islam

Dear D. Curtis Guild,

Thank you for your suggestions. Could you please direct me towards a relevant paper?

Md Tawabur Rahman

You can calculate number of layers in graphene flakes using Raman Spectroscopy, not bandgap. You can measure UV-Vis for a very dilute concentration of graphene dispersion to find the bandgap. Hope it will help.

Thanks!

Dear Dr. Md Tawabur Rahman ,

Thank you for your reply. Could you please point me towards any relevant paper/s which explain the measurement of bandgap of graphene using UV ViS?

Thank you

Dear Akib,

You can read the following manuscripts.

Article Band Gap Engineering of Chemical Vapor Deposited Graphene by...

https://www.nature.com/articles/nnano.2014.307

Dr. Md Tawabur Rahman , thank you so much for sharing these papers. I really appreciate your kind help.

Rafael Nunes Gontijo

Actually, you can't measure the bandgap of graphene, because it is very small, but you may be able to measure the singularities in twisted graphene systems like this one:

Article Resonance Raman spectroscopy in twisted bilayer graphene

Meenaketan Sethi

Dear Md.Akibul Islam,

It's not possible to determine the bandgap of the Graphene, but porous graphene's band gap determination could be possible. Please read the attached article.

Sethi, M., Bantawal, H., Shenoy, U.S. and Bhat, D.K., 2019. Eco-friendly synthesis of porous graphene and its utilization as high performance supercapacitor electrode material. Journal of Alloys and Compounds, 799, pp.256-266.

All the best.