The Metallization of Organic Monolayers

This project deals with the metallization of organic monolayers aiming at a detailed understanding of the metal-molecule contact, which is an important part of molecular electronics. The metallization of well-ordered self assembled monolayers (SAMs) of thiols on Au(111) is achieved by an electrochemical process, which was developed in our group. A proper w-functionalization of the thiol molecule forming the SAM is decisive for binding metal ions to the organic layer, which after electrochemical reduction form monoatomic high islands on the SAM.Structural properties and electrochemical behavior of the metallized SAM will be studied by in-situ STM, x-ray diffraction and cyclic voltammetry. Information about the electronic properties of such systems is obtained ex-situ

by mean of photoelectron spectroscopy (XPS and UPS) and low temperature scanning tunneling spectroscopy. In order to get a detailed comprehension of the interactions between metal and organic molecule, DFT calculations will be performed for corresponding model systems.