Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory
O 36.37: Poster
Tuesday, April 1, 2014, 18:30–22:00, P1
STM Investigations of Spirobifluorene Tripodal Molecules on Au(111) — •Kevin Edelmann1, Lukas Gerhard1, Marcin Lindner1, Michal Valasek1, Lei Zhang1, Hilbert von Löhneysen1,2,3, Elke Scheer4, Marcel Mayor1,3,5, Maya Lukas1, and Wulf Wulfhekel1,6 — 1Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76021 Karlsruhe — 2Physics Institute and Institute for Solid State Physics, Karlsruhe Institute of Technology (KIT), D-76049 Karlsruhe — 3DFG Center for Functional Nanostructures (CFN), D-76049 Karlsruhe — 4Physics Department, University of Konstanz, Universitätsstraße 10, D-78457 Konstanz — 5Department of Chemistry, University of Basel, CH-4056 Basel — 6Physikalisches Institut, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe
Decoupling molecular functional electronic units from a metallic substrate in a controllable manner is a major challenge for the investigation of the electronic properties of single molecules by STM. A promising approach is to use a tripodal molecule as a platform that carries the actual molecular wires or functional unit. [1]. Before functionality is integrated into this tripodal stand, the positioning and coupling of the platform to the substrate needs to be characterized thoroughly. To this end, we investigated spirobifluorene tripodal molecules. Different deposition techniques were used to deposit the molecules onto a Au(111) surface (from solutions or sublimation in UHV). We report on the morphology and electronic properties of these molecules by STM measurements. [1] Lukas et. al., ACS Nano 2013 7 (7), 6170-6180