Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 98: Organic-Inorganic Systems V: Adsorption on Metals
O 98.11: Talk
Friday, March 11, 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.