10/28/2023 0 Comments Merge in casa xpsPoulston et al., in their study of surface oxidation and reduction of Cu 2O and CuO, have used both the Cu LMM and the Auger parameter to distinguish Cu(0), Cu(I) and Cu(II). They also note the distinctive Cu L 3M 4,5M 4,5 peak at 916.5 eV for Cu 2O. have shown (in their Figure 8) the distinctly different peak shapes of the X-ray generated Auger LMM spectra for copper as the metal, Cu 2S and CuS. The use of the modified Auger parameter (2 p 3/2, L 3M 45M 45) as well as an inspection of the Auger peak-shape do allow for a more accurate assignment for these species and has been used effectively. Of note here is the statistically similar BE values for the Cu metal and Cu(I) oxide species. Table 1 lists Cu 2 p 3/2 BE and modified Auger parameter values from a survey of literature sources compiled in the NIST Database.
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