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XPS spectra of the core levels Zn 2p (a) and Cu 2p (c) overlayed XPS spectra of both kinds of samples and the experimental data (red symbols) with the fit and deconvolutions for (b) the thermally treated sample with Zn (deconvolution with component C1–blue line; the green line represents an Auger line, which is not taken into account in the chemical analysis) and (d) the thermally treated sample with Cu (deconvolutions: components C1–blue line and C2–green line).
