C1s peak for the ferroelectric powder sample is given here. Which binding energy value refer to carbon peak in this given graph? what is the standard BE value of carbon 1s? according to that, whether do I have to add or subtract to reach the std c1s?
It is confusing a lot.
Note:- C1s peak is not fixed during XPS characterization.
As the shift often results due to the detachment of electrons and thus a positive charge that is slowing down other electrons that it usually causes a lower kinetic or higher binding energy in the measurement.
Thus you will Need to subtract the 4.5eV from the binding energy in the narrow scans (what will shift the C1s Peak to 284.9).
Generally speaking, whatever you Need to do with your C1s Peak (substracting or adding a value) to move it to the standard value you want to use, needs to be done for the other scans as well. - assuming that the shift is independent of the binding energy!!
Dear Kathirkamu,
The XPS BE peak of C1s depends on several factors, like hybridization, environment etc. Therefore, it is very tough to predict the standard value of C1s. Therefore, I would like to suggest you to go through the NIST XPS database and you may find the BE of C1s for the environment, perfectly comparable with your molecular system.
Thanking you very much.
I think this link can be very useful:
https://www.researchgate.net/project/think-twice-before-you-use-C-1s-as-a-binding-energy-reference-in-your-XPS-work
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