Interface Physics Group, Prof. Dr. Olaf Magnussen

Institute of Experimental and Applied Physics, Christian-Albrechts-Universität zu Kiel

Switchable Surfaces

In this collaborative project, performed within the SFB 677 in cooperation with the group of Prof. Herges (Institute of Organic Chemistry, CAU), externally controllable nanoscale systems are designed by attaching novel photoswitchable molecules to metal surfaces. We aim at employing these functional adsorbate layers as molecular motors, for example for the directed transport of nanoparticles. To mount the switchable molecular units, typically azobenzene derivatives, in precisely controlled orientation and with defined spacing onto the surface we have developed the platform concept, which employs the triazatriangulenium (TATA) ion as a pedestal. We analyze the structure and photoswitching behavior of the TATA adlayers by scanning tunneling and scanning force microscopy, various spectroscopic methods (e. g., gap-mode SERS and surface plasmon resonance spectroscopy), as well as by photoelectrochemical experiments. 3d-atoms.jpg

Contact: Dr. Ulrich Jung

Funding: SFB 677 “Function by Switching” (project B2)

Selected publications: