Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 56: 2D Materials beyond Graphene
O 56.17: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-EG
Deposition of biphenylthiols on Au(111) by Electrospray Ionization — •Patrick Stohmann1, Sascha Koch1, Antoine Hinaut2, Thilo Glatzel2, Ernst Meyer2, and Armin Gölzhäuser1 — 1Department of Physics, Universität Bielefeld, Universitätsstrasse 25, 33615 Bielefeld, Germany — 2Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland
When aromatic self-assembled monolayers (SAMs) are electron-irradiated, intermolecular cross-linking leads to the formation of Carbon Nano Membranes (CNM) with molecular thickness [1]. The preparation of SAMs requires clean surface conditions for the formation of well-defined molecular structures as well as for the analysis via scanning probe techniques. However, thermal evaporation under UHV conditions may lead to the fragmentation of molecules during the sublimation while the formation of wet-prepared SAMs may suffer from polluting adsorbates on the bare surface. Here we present the study of biphenylthiols on Au(111), prepared by Electrospray Ionization (ESI). ESI allows for the introduction of organic molecules in vacuum under controlled conditions on atomically clean surfaces and was successfully applied in previous experiments [2]. The molecular deposition on the surface is investigated by means of scanning tunneling microscopy (STM) and nc-atomic force microscopy (NC-AFM) combined with Kelvin probe force microscopy (KPFM). [1] A. Turchanin et al., A. Gölzhäuser, Adv. Mater., 2009, 21, 1233-1237 [2] A. Hinaut et al., E. Meyer, Beilstein J. Nanotechnol., 2015, 6, 1927-1934