I have attached two SAED patterns for graphene based nanofillers. Can anyone guide me through the indexing of the said patterns? And also, is it possible to find out the number of graphene layers with the help of diffraction patterns?
Any help will be appreciated.
Thank you
Hello,
I don't see a scale bar in your SAED pattern, i.e. further evaluation is impossible. You should discuss with the person who made the images. This paper: https://www.researchgate.net/publication/305416064_Chemical_vapor_deposition_of_bilayer_graphene_with_layer-resolved_growth_through_dynamic_pressure_control/figures?lo=1
could give you some hints: The authors use not only SAED, but also imaging to get the graphene layer thickness.
Regards
Hi, you can estimate the number of layers by the ratio of h,l=2n, and h,l=2n+1. For example in the ED pattern of the thick region of phosphorene, there are strong h,l=2n reflections, and weak h, l=2n+1 reflections. In the ED pattern of the thin region, the sum of the intensities of the h, l=2n reflections is almost equal to that of the h, l=2n+1 reflections. So by the ratio of them, you can find the number of layers. It is also can be expanded to other 2D materials with some modification as you can find in related papers.
Stefan Baunack Thank you! Actually, I intentionally removed the scale bar to avoid further usage of the image as it is a work in progress.
Thank you for the recommended paper. Appreciate it!
Heshmat Asgharian Thank You for the answer. Can you kindly help me with some literature regarding the same? Thank you again!
@Akanksha Adaval Here is the link to the paper related to phosphorene:
https://iopscience.iop.org/article/10.1088/2053-1583/1/2/025001/meta
Akanksha Adaval the number of graphene layers can also be calculated from the XRD data also. You can refer this paper.Article Eco-friendly synthesis of porous graphene and its utilizatio...
Hope this will help.
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