Dear Scholars,
I am trying to characterize the Graphene I exfoliated using Raman. Literature indicates that 514-532 nm laser excitations were used for almost all cases. Unfortunately, in my school, the Raman has only 632 nm and 784 nm laser. Will my result be affected by this?
This question was already asked (and answered):
https://www.researchgate.net/post/Why_is_in_Raman_is_laser_of_wavelength_785_nm_not_compatible_with_graphene
Actually, there are two main peaks in the Raman spectra of Graphene, G band and G' band. The G band is not sensitive to the laser energy, but the G' band is sensitive. Please read our paper , https://ac.els-cdn.com/S0008622314009907/1-s2.0-S0008622314009907-main.pdf?_tid=aa91de38-2e34-440e-8f25-043e2f5a4ddf&acdnat=1525663161_ebcb2406eeafa7c438570caff75f7a90
Thank you
Hi,
Please check attached papers for clear understanding. It was observed that the relative peak intensities of the G′ mode to the G mode increase with decreasing laser excitation energy. The shift in peak values was also noticed on excitation with different wavelength laser.
Article Deep-ultraviolet Raman scattering studies of monolayer graph...
Article The SERS study of graphene deposited by gold nanoparticles w...
https://www.nature.com/articles/nnano.2013.46
Good Luck
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