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Figure 2
The take-off angle (θ) dependence of the ARUPS of a PTCDA film (42 Å thick) on MoS2 at hν = 40 eV and normal incidence (incidence angle of photons α = 0°). The intensity is normalized to the incidence photon flux. The energy levels calculated using the ab initio (STO-6G) method are shown by vertical bars, where longer bars indicate oxygen 2p non-bonding states (no). The binding energy scale of the calculated results was contracted by 0.68 and shifted by 2.35 eV in order to fit the energy positions between observed and calculated results for the HOMO (feature A) and no states at C=O groups (feature C).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 3| May 1998| Pages 1044-1046
https://doi.org/10.1107/S0909049597016877
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