Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Inorganic/Organic Interfaces

O 41.20: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster B

STM Imaging of Sequence Controlled Polymers — •Ivan Pentegov1, Bogdana Borca1, Verena Schendel1, Sabine Abb1, Peter Wahl1,4, Uta Schlickum1, Stephan Rauschenbach1, Tam Trinh3, Jean-Francois Lutz3, and Klaus Kern1,21Max-Planck-Institute for Solid State Research, D-70569 Stuttgart — 2Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne — 3Institut Charles Sadron, F-67034 Strasbourg — 4School of Physics & Astronomy, University of St. Andrews, Fife KY16 9SS, St. Andrews

Sequence controlled polymers (SCP) have recently attracted great interest because of their possible application as information storage platform. The SCP can encode a secondary molecular structure which could be used to define the properties of the molecule. A long oligomer sequence consisting of just two single monomers, which could be associated with a «0»and «1»bit is one possible way to realize SCP. The read-out of such a memory device presents a challenge on the atomic scale. Scanning Tunneling Microscopy (STM) is a promising nondestructive approach providing the necessary spacial resolution. We deposited several oligotriamines (OTA), each containing 3 monomers on a Cu(100) surface with electrospray Ion Beam Deposition (ES-IBD) technique under ultra-high vacuum conditions and transfered it in a vacuum suitcase to a low temperature STM, to probe the sequence of monomers in OTA and study its impact on properties of the whole oligomer chain as conductivity and structure. We were able to distinguish between the «1»and «0»monomer and observed that each OTA adsorbs in 2 different conformations on the surface.

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