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Figure 7
(a) High-resolution XPS spectra at the Fermi edge of polycrystalline gold measured at [h\nu] = 400 eV. Dots are electron counts integrated over the 60° acceptance angle of the analyser with error bars estimated according to the Poisson distribution. Lines are curve fits of a Fermi function assuming, to first order, a linear increase of the density of states below [E_{{{\rm F}}}]. (b) High-resolution XPS spectra of the Au 4f7/2 peak of a single-crystal Au(111) surface measured at a series of photon energies between 200 and 1200 eV. Solid lines are curve fits of two Voigt profiles. The weighted mean of the binding energy of the bulk peak is [E_{{{\rm B}}}] = (83.73 ± 0.01) eV, and the surface core-level shift is (0.329 ± 0.001) eV. The spectra are normalized to the area of the bulk peak and vertically offset for clarity.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 1| January 2017| Pages 354-366
https://doi.org/10.1107/S1600577516018646
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