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Core-level photoelectron spectra obtained for the as-prepared and annealed surface. (a) C1s spectra obtained with ħω = 330 eV. (b) F1s spectra obtained with ħω = 730 eV. In both cases the spectra are normalised to the photon flux.
Secondary electron distribution (ħω = 60 eV) for the as-prepared surface and after annealing to the temperatures shown. The solid lines illustrate how the low-energy electron cut-off was determined from the intersection of the baseline with the leading edge of the low energy peak.
The evolution of the work function (solid squares), electron affinity (open circles), and band bending (inset) for the F:C(100) surface with annealing temperature.
Schematic energy level diagram of the F:C(100)–(2 × 1) surface based upon parameters measured after annealing the sample to 350 °C.
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