Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures II
O 23.7: Vortrag
Dienstag, 13. März 2018, 12:15–12:30, MA 004
Engineering the surface state of Au(111) by molecular patterning — Jun Li1, •Nico Schmidt1, Stefano Gottardi1, Leonid Solianyk1, Juan Carlos Moreno-Lopez2, Zakaria M. Abd El-Fattah3,4, Ignacio Piquero-Zulaica5, Jorge Lobo-Checa5, and Meike Stöhr1 — 1Zernike Institute for Advanced Materials, University of Groningen, Netherlands — 2Faculty of Physics, University of Vienna, Austria — 3Faculty of Science, Al-Azhar University, Nasr City, Egypt — 4ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Spain — 5Materials Physics Center, San Sebastian, Spain
The controlled tuning of material properties on the nanometer scale is a central goal in nanoscience. Artificial nanostructures can be built by STM in an atom-by-atom fashion. Corral structures built in this way were shown to confine the surface state electrons and locally modify the electronic surface properties. However, the manipulation process is impractical to change the properties of the entire surface. In contrast, molecular self-assembly offers the possibility to build well-ordered and defect-free nanostructures. 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 also surface wide. Here, we report on tuning the electronic structure of Au(111) by adsorbing a porous molecular network made from 1,3,5-benzenetribenzoic acid molecules. With ARPES the formation of an artificial band structure based on surface state confinement was detected.