How can we perform a quantitative analysis of the XPS peaks using Origin software? Please help, How can we do a quantitative analysis of each peak? The peaks of C1s are attached below.
It looks like you used functionally identical components with heavily differing widths. That is most likely an incorrect deconvolution.
If you assume it is all sp3 carbon, I would recommend to use close to identically wide components. If you have sp2 carbon involved, and it certainly looks like that: in that case you have a systematically asymmetric signal and you need to use a different function, see
https://www.thermofisher.com/de/de/home/materials-science/learning-center/periodic-table/non-metal/carbon.html
I should mention that the exact asymmetric function is point of large controversies, so no matter which you choose, somebody will disagree with it.
The first answer is DO NOT use Origin. Please use dedicated XPS software which at least has some traceable methodology to fitting and are typically much better for asymmetric line shapes for sp2 carbon and also for Voigt functions for the other peaks.
I would also add that if you are not confident with fitting, I would suggest not starting with the asymmetric C1s peak
Dear Sir David J. Morgan, I am using the XPS Peakfit software for peak fitting and the Voigt function. However, I am still not confident that the peaks are perfectly fitted or misfitted.
Well, yes, your peaks are not correct. Dr. Morgan and I agree on this.
For sp2 carbon you need an asymmetric function, not Voigt.
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