Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 40: Methods: Scanning probe techniques I
O 40.10: Vortrag
Mittwoch, 25. März 2009, 17:15–17:30, SCH A316
Manipulating surface diffusion ability of single molecules by scanning tunneling microscopy — Dingyong Zhong1,2, Jörn-Holger Franke1, •Tobias Blömker3, Gerhard Erker3, Harald Fuchs1,2, and Lifeng Chi1 — 1Physikalisches Institut, Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany & Center for Nanotechnology (CeNTech), Universität Münster, Heisenbergstr. 11 , 48149 Münster, Germany — 2Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany — 3Organisch-Chemisches Institut, Universität Münster, Corresstr. 40, 48149 Münster, Germany
The bonding of single diferrocene [Fc(CH2)14Fc, Fc = ferrocenyl] molecules on a metal surface can be enhanced by partial decomposition of Fc groups induced by the tunneling current in scanning tunneling microscopy. Although the isolated intact molecule is mobile on the terrace of Cu(110) at 78 K, the modified molecule is immobilized on the terrace. Calculations based on density functional theory indicate that the hollow site of the Cu(110) surface is the energetically favorable adsorption site for both ferrocene and the Fe-cyclopentadienyl complex, but the latter one possesses a much higher binding energy with the substrate.