Structural Properties of Norbornene Monolayers on Ge(100)

Abstract

The adsorption structures of norbornene monolayers on a Ge(100) surface were investigated by using scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. At a coverage of similar to 0.05 ML, most norbornene molecules adsorb on top of Ge dimers (OT). As the coverage increases, new features located between two neighboring Ge dimers appear: (i) single end bridge (SEB) and (ii) paired end bridge (PEB). Of these three configurations, the OT configuration is the most stable, according to the adsorption energies obtained with DFT calculations.