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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Friday, 04 June 2004
(at 13:15 in room Phy 5.0.21)
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Contacting a single molecular wire by STM Manipulation

Francesca Moresco

Institut für Experimentalphysik
Freie Universität Berlin

The Lander molecule (C90H98) consists of a long polyaromatic main board maintained parallel above a surface by four TBP spacer groups. It represents a model system for investigating the electronic contact of a molecular wire to a nanoscale metallic electrode. Some recent manipulation experiments of single Lander molecules realized by STM at low temperature are presented, where the molecular wire part of a Lander is contacted to a monoatomic step and to a two atoms wide metallic nanostructure. The contact is characterized by the apparent height of the contact point in STM images and, in case of the Cu(111) substrate, by the perturbation observed in the electronic standing wave patterns. Moreover, the investigation of the standing wave pattern of a single Lander on a terrace show that specific information concerning the electronic interaction of the different internal groups of the molecule with the surface can be obtained.

slides (pdf)

Invited by C. Strunk (Seminartag: Graduiertenkolleg: ``Nichtlinearität und Nichtgleichgewicht in kondensierter Materie'', Thema: Electronics at molecular scales)

last modified: 2021.05.05 Wed
author: webadmin