Dresden 2017 – scientific programme
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O: Fachverband Oberflächenphysik
O 91: Nanostructures at Surfaces: Molecular Systems I
O 91.1: Talk
Thursday, March 23, 2017, 10:30–10:45, REC/PHY C213
Synthesis of highly ordered arrays of organic nanowires on a magnetic surface alloy — •Jens Brede1, Mikel Abadia1, Celia Rogero1,2, Ignacio Piquero-Zulaica1, Maxim Ilyn1, and J. Enrique Ortega1,2,3 — 1Centro de Física de Materiales CFM–MPC(CSiC-UPV/EHU), Paseo Manuel Lardizabal 5, E-20018 San Sebastián, Spain — 2Donostia International Physics Center, Paseo Manuel Lardizabal 4, E-20018 San Sebastián, Spain — 3Departamento Física Aplicada I, Universidad del País Vasco, E-20018 San Sebastián, Spain
The transfer of well-established in-situ methods for growing covalently bonded macromolecules with atomic precision onto magnetic substrates presents a viable route toward studying emergent intrinsic magnetic properties in these novel structures as well as their magnetic coupling to the underlying substrate. Here, we present a multi-technique characterization of the polymerization of 4,4-dibromoterphenyl precursors into ordered arrays of poly (p-phenylene) chains on top of the bi-metallic GdAu2 surface alloy. The activation temperature for bromine scission and subsequent homocoupling of molecular precursors was followed by temperature dependent XPS. Structural characterizations of the highly ordered molecular and polymeric phases were performed by LEED and STM. The electronic structures of the valence band of the different phases were determined with ARPES and magnetic ordering in the GdAu2 alloy was established by XMCD during all stages of the reaction.