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O: Fachverband Oberflächenphysik

O 98: Organic-Inorganic Systems V: Adsorption on Metals

O 98.11: Vortrag

Freitag, 11. März 2016, 13:00–13:15, H24

Probing the Conformations of Synthetic Sequence Controlled Polymers — Ivan Pentegov¹, Tam Trinh², •Stephan Rauschenbach¹, Uta Schlickum¹, Sabine Abb¹, Ludger Harnau¹, Simone Conti², Duy Le³, Talat Rahman³, Marco Ceccini², Jean-Francois Lutz², and Klaus Kern¹ — ¹Max-Planck-Institute for Solid State Research, Stuttgart — ²Université de Strasbourg, France — ³University of Central Florida, Orlando FL, USA

In natural as well as synthetic sequence controlled polymers (SCP) the sequence of building blocks covalently hardwires a secondary molecular structure, either to store information or to encode properties like molecular conformation. Therefore the two major challenges for the application of SCP are deciphering the sequence of a SCP and relating the sequence to its conformation. We employ scanning tunneling microscopy (STM) to characterize individual SCPs of the class of oligo-triazolamines (OTA) at highest spatial resolution. For this, electrospray ion beam deposition (ES-IBD) ensures chemical purity and intact deposition on ultrapure substrates. We observe conformations, which can be modeled by molecular dynamics (MD) simulations and density functional theory (DFT). Depending on the sequence, we find structural variety depending on the sequence of '0' and '1' represented by the absence or presence of a methyl group, respectively.