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 36.32: Poster
Dienstag, 15. März 2011, 18:30–22:00, P4
Shape and dynamics of 2D hierarchic bicomponent networks — •Wolfgang Krenner1, Florian Klappenberger1, Younes Makoudi1, Nenad Kepcija1, Dirk Kühne1, Svetlana Klyatskaya2, Mario Ruben2,3, and Johannes V Barth1 — 1Physik Department E20, TU München, München, Germany — 2Insitute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe, Germany — 3IPCMS-CNRS UMR 7504, Université de Strasbourg, Strasbourg, France
Towards the construction of molecular networks driven by hierarchic principles, the combination of tailored molecular building blocks has proven to be an essential tool. We present an UHV, low-temperature scanning tunneling microscopy study employing a hierarchic growth scenario to realize bicomponent, self-assembled molecular networks. The molecular templates constructed in this fashion display two types of bonding schemes.
The two building blocks, namely dicarbonitrile sexiphenyl and N,N’ diphenyl oxalic amide, arrange in a variety of molecular networks. By tuning the stochiometry, the formation of a predominant type of the long range networks found on the Ag(111) surface, can be steered. With this approach it is possible to construct open-porous networks with variable pore size and geometry.
Moreover, thermally induced molecular motion is found to occur in the networks with the largest pore size. A migration of sexiphenyl, acting as weaker bound spacers in these networks, along the chain direction of the bi-molecular template is encountered.