I am preforming xps data analysis of carbon nanaotubes mat (CNTs mat) using XPSPEAk4.1 software, I deconvoluted the C1s spectrum using one asymmetric (TS=0.2 and TL=200) and six symmetric G:L sum functions (shirley background). The aymmetric peak for the aromatic sp2 carbon (C=C) centerd at 284.6 eV and has FWHM=0.5, but I got another peak (symmetric) with shift of only +0.1 eV (284.7 eV) and FWHM=0.6, in addition I got third peak at 284.8 eV with FWHM=1.2 ( defective carbon).
what could the second peak attributed to? any help will be highly appricated
This sounds like way too many peaks to me. Why do you expect 7 different carbon environments? What do you ascribe your 6 symmetric peaks to? A picture of your fit would also help to assess your course of action.
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