Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 58: Surface chemical reactions II
O 58.2: Vortrag
Mittwoch, 24. März 2010, 15:15–15:30, H42
Single-molecule synthesis and characterization of metal ligand complexes by low-temperature STM — •Ingmar Swart1,2, Peter Liljeroth2,3, Sami Paavilainen4, Jascha Repp1,3, and Gerhard Meyer3 — 1Institute of Experimental and Applied Physics, University of Regensburg, 93040 Regensburg, Germany — 2Condensed Matter and Interfaces, Debye Institute for Nanomaterials Science, PO Box 80000, 3508 TA Utrecht, the Netherlands. — 3IBM Research - Zurich, 8803 Rüschlikon, Switzerland — 4Institute of Physics, Tampere University of Technology, 33720 Tampere, Finland
The use of ultrathin insulating films facilitates the study of the unperturbed electronic structure of molecules by STM. This opens up the possibility of using the STM as a single-molecule laboratory where the molecules are both synthesized and electronically characterized in-situ.
Here, we present the STM-based synthesis of metal-ligand complexes, starting from individual metal atoms (iron and nickel) and organic molecules (dicyanoanthracene, DCA) deposited on an ultrathin insulating film. Lateral manipulation is used to form linear M(DCA)2 complexes. We directly visualize the frontier molecular orbitals by STM orbital imaging and characterize their spatial symmetries. In addition, we show how their order can be controlled by changing the nature of the metal atom. This is the first example of a synthesis and electronic characterization of a metal-ligand coordination complex on an ultrathin insulating film.