Dresden 2003 – scientific programme
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O: Oberflächenphysik
O 6: Nanostrukturen I
O 6.5: Talk
Monday, March 24, 2003, 12:15–12:30, M\"UL/ELCH
Locally reconfigurable arrays of supramolecular nanowires — •Ferdinand Jamitzky1,2, Thomas Markert2,3, Frank Trixler1, Axel Gross3, and Wolfgang Heckl1 — 1LMU München — 2MPE Garching — 3TU München
Nanoelectronic devices made of semiconductor and polymer nanowires, carbon nanotubes and single molecules have been realised in principle by applying crystallisation chain polymerisation and other bottom-up fabrication strategies. A powerful alternative to these strategies is the self-organisation of molecular building blocks into supramolecular architectures, such as surface-supported chains. Applied to semiconducting materials, this strategy allows going beyond simple miniaturising electronics, if the potential of supramolecular chemistry, including reversibility and various self-processes (e.g. self-contacting), can be tapped. However, this requires the ability to repeatedly and locally control self-organisation at the nanometre scale, which remains a challenge so far. Here we present a simple and rapid preparation method under ambient conditions which enables the controlled self-organisation of Quinacridone (QAC) molecules at a solid-smectic interface into supramolecular nanowires. We demonstrate that orientation and length of the wires can be repeatedly reconfigured on a nanometre scale and that the self-reconnecting tendency of previously cut wires can be used to induce assembly of user-defined arrangements. This opens up a way for the fabrication of controllable dynamic molecular electronic and optoelectronic nanodevices.