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Characterisation of TCNQ and 5A heteromolecular layers on Ag(100)
 Cohl, Alexandr ; Jakub, Zdeněk (referee) ; Stará, Veronika (advisor)
This bachelor thesis deals with the formation and subsequent characterization of mixed phases of pentacene (5A) and tetracyanoquinodimethane (TCNQ) on the surface of a Ag(100) monocrystal. The preparation of these mixed phases was carried out by deposition from an effusion cell in ultra-high vacuum (UHV) conditions. The quality and arrangement of the formed layers were then characterized by low-energy electron microscopy (LEEM) and scanning tunneling microscopy (STM). The behaviour and arrangement of monomolecule layers of both TCNQ and 5A on the surface is also described. Mixed phases with different ratios of 5A and TCNQ and the effect initial coverage and deposition order have on the formation of the final structure are discussed as well. Ultraviolet photoelectron spectroscopy (UPS) measurements are used to compare the electronic properties of the 5A and TCNQ monomolecule layers with the 1:1 mixed phase.
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