Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.11: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

First STM measurements on a new class of nanowheels — •Anja Wadewitz¹, Jörg Meyer¹, Francesca Moresco¹, Gwénaël Rapenne², Henri-Pierre Jacquot², Christian Joachim², and Gianaurelio Cuniberti¹ — ¹Institute for Materials Science and Max Bergmann Center of Biomaterials, Dresden University of Technology, 01062 Dresden, Germany — ²CEMES-CNRS, Toulouse, France

Manipulation of single molecules with a scanning tunneling microscope (STM) tip is a well established technique to study the adsorption of molecules and their mechanical properties on a surface. Recent progress in molecular manipulation has stimulated the design and synthesis of molecules that mimic macroscopic machinery, transposing mechanical functions to the scale of a single molecule. Here, we present the first low temperature STM measurements of a new class of nanowheels on Au(111). A nanowheel consists of two sub-phthalocyanine molecules connected by a carbon axis. The phthalocyanine fragments are nitrogen-tagged. Due to the tagging it should be possible to follow the rolling motion of the wheel just by imaging the molecule. A fast dissociation of the molecules with temperatures and light intensity is expected. Therefore, the evaporation temperature was kept as low as possible and after evaporation the sample was transferred immediately into the STM to minimize temperature and light effects. Nanowheels on Au(111) were imaged by STM, showing intact molecules as well as fragments. These first results show that the nanowheels can be deposited intact on a metal surface and that it is therefore possible to manipulate them with the STM tip.