Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 34: Nanostructures at Surfaces II
O 34.2: Vortrag
Dienstag, 8. März 2016, 10:45–11:00, H6
Self-assembling and chemistry of ferrocene dicarboxylic acid on different substrates — •Jan Berger1, Olexandr Stetsovych1, Krzysztof Kośmider1, Martin Vondráček2, Martin Švec1, and Pavel Jelínek1 — 1Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, CZ-16200, Prague, Czech Republic — 2Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, CZ-18221, Prague, Czech Republic
Ferrocene based molecules are extremely appealing as they provide the possibility of having built-in spin or charge functionalities. However there are only limited studies of structural and electronic properties on surfaces so far. We investigated self-assembling processes of ferrocene-based molecules on both metallic (Ag(111), Cu(110)) and insulating (Cu3N/Cu(110)) with high-resolution AFM/STM combined with XPS and NEXAFS. The experimental evidence is corroborated with total energy DFT calculations and advanced AFM simulations. The analysis of the data allows understanding of the unique arrangement and adsorption geometry of the molecules on each substrate, as well as the chemical changes of the carboxylic groups. Where the molecules on the Ag(111) show only a weak interaction with the substrate and a complex self-assembling configuration. On the Cu(110) and Cu3N/Cu(110) the carboxylic groups are a subject to dehydrogenation forming strong chemical bond to the substrate onto the Cu atoms, keeping an upright orientation of the ferrocene cyclopentadienide rings.