C60 adsorption on Cu(110) studied by optical spectroscopy

Abstract

The formation of the interface between C60 thin films and the Cu(110) surface has been investigated in situ using reflectance difference spectroscopy (RDS). The electronic interaction between C60 molecules in the first monolayer and the substrate inhibits low-energy intramolecular transitions, whereas the C60 molecules above the first monolayer are effectively decoupled from the substrate. The morphology of C60 thin films prepared at room temperature is thermally stable up to 500 K. Above this threshold, optical spectroscopy and low energy electron diffraction (LEED) indicate the formation of rather large three dimensional C60 islands on a one monolayer thick wetting layer. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.