Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Inorganic/Organic Interfaces

O 41.2: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster B

Confinement of surface state electrons by molecular self-assembled networks — •Jun Li, Stefano Gottardi, Juan Carlos Moreno Lopez, Leonid Solianyk, and Meike Stöhr — Zernike Institute for Advanced Materials, University of Groningen, Netherlands

The controlled tuning of material properties on the nanometer scale is a central goal in nanoscience. Artificial nanostructures can be built atom by atom with scanning tunneling microscopy (STM). Corral structures built by this technique were shown to confine the surface state electrons and to locally modify the electronic surface properties. However, the manipulation process is impractical to change the electronic properties of the entire surface. On the other hand, molecular self-assembly offers the possibility to build well-ordered and defect-free nanostructures due to its intrinsic error-correction. By using different molecular building blocks, networks of different sizes and symmetries can be formed, which allows for tuning the electronic structure not only locally but surface wide. Here, we report on confining the surface state electrons of Au(111) by a porous molecular network, which was formed by self-assembled 1,3,5-benzenetribenzoic acid. STM and STS were performed to spatially characterize the electronic properties and to analyze the confinement of the surface state electrons in the pores of the molecular network