Journal
SURFACE SCIENCE
Volume 531, Issue 2, Pages 123-130Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0039-6028(03)00507-7
Keywords
low energy electron diffraction (LEED); visible and ultraviolet photoelectron spectroscopy; growth; interface states; surface relaxation and reconstruction
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We present the growth morphology, the long-range ordering, and the evolution of the valence band electronic states of ultrathin films of copper phthalocyanine (CuPc) deposited on the Au(110)-(1 x 2) reconstructed surface, as a function of the organic molecule coverage. The low energy electron diffraction patterns present a (5 x 3) reconstruction from the early adsorption stages. High-resolution UV photoelectron spectroscopy data show the disappearance of the Au surface states related to the (1 x 2) reconstruction, and the presence of new electronic features related to the molecule-substrate interaction and to the CuPc molecular states. The CuPc highest occupied molecular orbital gradually emerges in the valence band, while the interface electronic states are quenched, upon increasing the coverage. (C) 2003 Published by Elsevier Science B.V.
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