Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 86: Nanostructure at Surfaces: Molecular Assembly

O 86.2: Vortrag

Donnerstag, 19. März 2015, 15:30–15:45, HE 101

Tuning on-surface coordination polymers to form chains and networks forming quantum boxes to investigate Xe condensation in an atom-by-atom manner. — •O. Popova, S. Nowakowska, A. Wäckerlin, S. Kawai, T. Ivas, J. Nowakowski, S. Fatayer, C. Wäckerlin, T. Nijs, J. Girovsky, S. Martens, A. Kleibert, N. Ballav, E. Mayer, J. Björk, M. Stöhr, L. Gade, and T. Jung — Basel, Switzerland

Coordination between organic molecular ligands and metal adatoms has been established to form stable, well-ordered and here chemically tunable endo or exo-ligands and corresponding polymers. By combining STM, XPS, NEXAFS and DFT, we demonstrate that the amino-functionalized perylene derivative,DPDI, undergoes specific levels of dehydrogenation depending on the nature of the present adatoms. Moreover, the Cu-coordinated 3deh-DPDI network which is created after the deposition of DPDI on Cu(111) and subsequent annealing confines the Shockley surface state into well-defined quantum boxes.These boxes provide an ideal template for studying Xe condensation process atom-by-atom under the interplay of different well known interactions. Our direct, real-space analysis reveals the subtle interplay of competing directional and non-directional interactions which determine the condensate structure. This approach is applicable significantly beyond the presented Xe case. Also such adsorbate containing *quantum boxes* provide unprecedented systems for the in-depth comparison of simulations using different quantum mechanical models.