Electronic states of CuPc chains on the Au(110) surface

The electronic properties of Cu-phthalocyanine (CuPc) molecules flat lying along the channels of the Au(110) reconstructed surface have been investigated by means of ultraviolet and x-ray photoelectron spectroscopy. The ordered chains give rise to a highly ordered single-layer structure with a ( 5 ×...

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Bibliographic Details
Published in:The Journal of chemical physics 2009-11, Vol.131 (17), p.174710-174710-8
Main Authors: Evangelista, F., Ruocco, A., Gotter, R., Cossaro, A., Floreano, L., Morgante, A., Crispoldi, F., Betti, M. G., Mariani, C.
Format: Article
Language:English
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Summary:The electronic properties of Cu-phthalocyanine (CuPc) molecules flat lying along the channels of the Au(110) reconstructed surface have been investigated by means of ultraviolet and x-ray photoelectron spectroscopy. The ordered chains give rise to a highly ordered single-layer structure with a ( 5 × 3 ) symmetry. Although from the core-level analysis not any significant charge transfer between the molecules and the underlying Au surface is observed, the valence band photoemission data bring to light CuPc-induced features localized at the interface. In particular, energy versus momentum dispersion of an interface state reveals a bandwidth of about 90 meV along the enlarged Au channels, where the CuPc chains are formed, with a defined fivefold symmetry well fitting the CuPc intermolecular distance.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.3257606