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O: Fachverband Oberflächenphysik

O 39: Nanostructures at Surfaces IV (Dots, Particles, Clusters, Arrays)

O 39.8: Vortrag

Mittwoch, 28. März 2007, 17:30–17:45, H36

Self-Assembly of Metal-Organic Coordination Networks at Surfaces with Scalable Nanocavity Size and Aspect Ratio — •Alexander Langner¹, Steven L. Tait¹, Chandrasekar Rajadurai², Nian Lin¹, Mario Ruben², and Klaus Kern¹ — ¹Max-Planck-Institut für Festkörperforschung, Stuttgart — ²Institut für Nanotechnologie, Forschungszentrum Karlsruhe

We report on the rational use of two-dimensional supramolecular self-assembly as efficient bottom-up method for nanoscale patterning of metal surfaces. The controlled self-organization of multi-ligand systems by metal-organic coordination is investigated on Cu(100) under ultra high vacuum (UHV) conditions with scanning tunneling microscopy (STM). Mixtures of dicarboxyl and bipyridyl molecules with vapor deposited iron atoms assemble into arrays of coordination nodes, each consisting of 2 molecules of each functional group termination, coordinated in a cross geometry to a di-iron center. This directional and selective coordination produces ordered rectangular networks in which the size and the aspect ratio of the cavities can be scaled by varying the backbone length of the different linker molecules independently. Investigation of these model systems also gives insight into fundamental properties of self-assembly such as self-recognition or error correction.