Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 16: Surface State Spectroscopy II
O 16.12: Vortrag
Montag, 7. März 2016, 17:45–18:00, H4
Two air- and water- stable ionic liquids in the presence of TaF5 and NbF5. Photoelectron Spectroscopy Study — •Anna Dimitrova1, Marit Walle1, Marcel Himmerlich1, Stefan Krischok1, Adriana Ispas2, and Andreas Bund2 — 1Technische Universität Ilmenau, Institut für Physik und Institut für Mikro- und Nanotechnologien, Deutschland — 2Technische Universität Ilmenau, FG Elektrochemie und Galvanotechnik, Deutschland
Electroplating from Ionic Liquids has a great potential for deposition of metals and alloys with a Nernst potential below that of water decomposition. In order to control the electrochemical processes, an understanding of intra- and outer molecular interactions which take place before the metal electrochemical reduction is required. To this end we used Photoelectron Spectroscopy as a tool to study the electronic structure and the local environment of the atoms in thin films of a binary mixture - Ionic Liquids and TaF5 or NbF5. Two ionic liquids with a common anionic part were used: 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide, [BMP][Tf2N] and 3-propyl-1-methyl-immidazolium bis(trifluoromethylsulfonyl)imide, [PMIm][ Tf2N], in which TaF5 and NbF5 were separately dissolved in a different stoichiometry. In order to avoid the fast oxidation of both of the metal salts, the sample preparation and transportation to the Ultra-High Vacuum Chamber was done in an O2-free atmosphere. In this study the surface chemical compositions at different ionic liquid-to-metal salt concentration are discussed and compared with previous data, where ambient conditions were used for sample preparation.