Assembly and electronic structure of octithiophene on Au(111)

作者：Varene Erwan; Pennec Yan; Tegeder Petra^*

来源：Chemical Physics Letters, 2011, 515(1-3): 141-145.

DOI：10.1016/j.cplett.2011.09.010

Scanning tunneling microscopy and spectroscopy as well as photoemission spectroscopy have been employed to study the adsorption behavior and electronic structure of alpha-octithiophene (8T) on Au(111). At a monolayer (ML) and bilayer coverage well-ordered molecular rows forming closely packed films are found, with 8T molecules tilted with respect to the surface plane allowing for intermolecular pi-pi-interactions. Two unoccupied electronic states are observed, which possess the same energetic position for 1 and 2 ML, indicating a low electronic coupling strength between 8T and the metallic substrate. This study shows that 8T grow on Au(111) in an ordered way generating a defined interface which is a basic requirement for future applications of 8T in (opto) electronic devices.

• 出版日期2011-10-17