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Adsorption of complex organic molecules can induce perfectly ordered nano-structuration of metal surfaces. Large molecules interaction and their anchoring to surfaces are connected with the details of the molecule-substrate bonding. The interaction is extended over a considerable number of sites, leading to strong adaptation mechanism to surface chemistry, geometry and corrugation. Theoretical calculations on such systems are challenging because the system must be thought as a whole, considering simultaneously both the adsorbed molecules and the substrate. The first structural evidence of this ordering scheme was found on the C60/Au(110)-p(6x5) system [1] by 2D surface diffraction data. Density Functional Theory theoretical calculations are compared with direct and inverse photoemission results. We found a strong effect on structure and electronic redistribution involving both substrate and molecule after deposition and superstructure deformation. Strong directional bonds in correspondence to the nanopits is found. The origin of the driving force of the nanopits formation is discussed.
[1] M. Pedio, R. Felici, X. Torrelles, P. Rudolf, M. Capozi, J. Rius, S. Ferrer, Phys. Rev. Lett. 85, 1040-1043 (2000)
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