Dresden 2009 – wissenschaftliches Programm

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SYSO: Symposium Self-organizing Surfaces and Interfaces

SYSO 3: Self-Organizing Surfaces and Interfaces - Posters

SYSO 3.15: Poster

Mittwoch, 25. März 2009, 17:30–19:30, P3

Probing electronic states of double layered molecules in a STM junction — •Francesca Matino¹, Guillaume Schull¹, Marco Knutzen¹, Sandro Gabutti², Markus Neuburger², Marcel Mayor², and Richard Berndt¹ — ¹IEAP-Universitat Kiel, Kiel, Germany — ²University of Basel, Basel, Switzerland

In recent years, electron transport through single molecules has become a key issue for molecular electronics. It is known that the electronic coupling between molecules and metallic electrode can affect the transport behaviour, so thin insulating layers are often used to decouple molecules and keep their properties unaltered. A promising alternative are cyclophanes, upright 3D-structures consisting of layered π-systems bridged with aliphatic chains, where the upper π-system is far away from the surface. We have used a UHV low temperature-STM to study the electronic properties of double layered conjugated molecule on metal surface. We report on the organisation and molecular properties of a single and a double layered naphthalenediimide on Au (111) surface. We focus on the influence of metal surface on the electronic states of both molecules as well as the interaction between the separate π-layer, in order to validate the electronic decoupling capability of cyclophanes on surface.