Dear Dr. Arqam Anjum,

I suggest the following papers regarding your question and I hope they can help you:

- Improving the deconvolution and interpretation of XPS spectra from chars by ab initio calculations

Matthew Smith, Louis Scudiero, Juan Espinal, Jean-Sabin McEwen, Manuel Garcia-Perez

Carbon - Volume 110, December 2016, Pages 155-171

- Adsorption of Polycyclic Aromatic Hydrocarbons by Graphene and Graphene Oxide Nanosheets

Jun Wang, Zaiming Chen, Baoliang Chen

Environmental Science & Technology, March 2014 48(9)

- Graphene etching on SiC grains as a path to interstellar polycyclic aromatic hydrocarbons formation

P. Merino, M. Švec, J.I. Martinez, P. Jelinek, P. Lacovig, M. Dalmiglio, S. Lizzit, P. Soukiassian, J. Cernicharo & J.A. Martin-Gago

Nature Communications volume 5, Article number: 3054 (2014).

Best regards, Pierluigi Traverso

follow

For sp2 carbon, you may want to use the Doniach-Sunjic function:

http://www.casaxps.com/help_manual/line_shapes.htm (and references therein)

Although you will have to be extremely careful to differentiate what's a tail and what's an additional component. No matter what choice you make, expect some debate with paper reviewers because the community isn't fully converged on the issue.

Thanks everyone for all help, I will look up to the mentioned links.

Have a great day!

Hello Arqam,

I personnally used a Pseudo-Voigt function associated with an assymetry factor using CasaXPS. The assymetry factor can be tailored to the shape of your curve using 3 parameters (to control the asymptotic form of the asymmetric tail and also to define the width of the function used to convolute the basic shape of the profile).

It provides me the optimal curve fitting for the C-C principal graphitic contribution of the C 1s peak for carbon black and recovered carbon black samples.

Best regards,