Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.79: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Multi-molecular networks on Ag(111) displaying a novel bonding scheme — •Wolfgang Krenner1, Dirk Kühne1, Florian Klappenberger1, Svetlana Klyatskaya2, Mario Ruben2, and Johannes V Barth1 — 1Physikdepartment E20, TU München, München, Germany — 2Institute of Nanotechnology, Forschungszentrum Karlsruhe, Karlsruhe, Germany
The combination of different types of molecular building blocks provides a wide range of possibilities for the hierarchic construction of molecular networks on metallic surfaces via self-assembly. We present a UHV, low-temperature scanning tunneling microscopy study of the formation of multi-molecular networks constructed with two different bonding schemes.
After deposition of the two building blocks, namely dicarbonitrile polyphenyl (A) and diphenyl oxalic amide (B), at room temperature onto Ag(111), hydrogen-bonded networks formed by molecular self-assembly can be observed. The shape of the molecular networks depends on coverage and stoichiometry.
By tuning the growth conditions highly regular molecular networks can be achieved providing rhombic cavities of an approximate size of 8 nm2. The elementary binding motif features a hydrogen bond from a carbonitrile group of molecule A to the amine group of molecule B. This type of hydrogen bond has not been observed so far for surface confined self-assembly.