Self-organization of cobalt-phthalocyanine on a vicinal gold surface revealed by scanning tunnelling microscopy

摘要

Adsorption of cobalt-phthalocyanine on Au(788) in the sub-monolayer coverage regime leads to a preferential occupation of step edges with the molecule plane tilted such as to bridge adjacent terraces. Molecules which adsorb on terraces leave the surface reconstruction of Au(788) unchanged and exhibit the propensity to occupy face-centered cubic stacking domains. Tunnelling spectroscopy in the centre of the molecule reveals cobalt d-orbital related features, while spectroscopy on the ligands shows the lowest unoccupied molecular orbital.