Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 34: Nanostructures at Surfaces II
O 34.4: Vortrag
Dienstag, 8. März 2016, 11:15–11:30, H6
On-surface synthesis of non-symmetric molecular nodes — •Christophe Nacci1, Francisco Ample2, Andreas Viertel3, Stefan Hecht4, Christian Joachim5, and Leonhard Grill6 — 1Department of Physical Chemistry, University of Graz, Austria — 2IMRE, Singapore — 3Department of Chemistry, Humboldt-Universität zu Berlin, Germany — 4Department of Chemistry, Humboldt-Universität zu Berlin, Germany — 5CEMES-CNRS, Toulouse, France — 6Department of Physical Chemistry, University of Graz, Austria
On-surface synthesis is a promising strategy for building complex molecular architectures that are potentially relevant in the field of molecular electronics. Suitable design of molecular building blocks is required in order to assemble functional molecules into stable covalently bound networks with a well-defined spatial arrangement. In this presentation low-temperature scanning tunneling microscopy and spectroscopy are used to image individual molecules and determine their electronic properties at surface with high spatial resolution. Non-symmetric molecular nodes comprised of central molecule and equipped with short polyfluorene wires at predefined positions were grown by on-surface synthesis. The asymmetric node structure is highly desired since it encodes different conjugated pathways, i.e. potentially different electrical channels. The assembly of different molecular nodes will be discussed as well as the electrical characterization of individual non-symmetric molecular nodes by pulling them off a supporting surface with the tip of a scanning tunneling microscope.