Figure 5. C1s and O1s PES spectra recorded inside and outside the ta-C wear scar, using an incident photon beam of hv = 700 eV.

Note that the beamline energy resolution is lower for an incident photon energy of 700 eV than an incident photon energy of 350 eV, therefore, the FWHM of the blue and green components of the C1s peaks are 1.45 eV ± 0.3 eV and 1.8 eV ± 0.3 eV, respectively, which are much larger than those recorded at 350 eV (see text). The FWHM of the blue and pink components of the O1s core level peaks (the left panel of the figure) are both 2.0 eV ± 0.3 eV.