Calendar of Physics Talks Vienna

The Reconstructed Fe3O4(001) Surface as an Adsorption Template
Speaker:Ing. Zbynek Novotny (Technische Universität Wien, Institut für Angewandte Physik)
Abstract:Magnetite, Fe3O4, is a fascinating material for its electronic, magnetic, and catalytic properties. This presentation will deal with the (001) terminated surface. This surface forms a (√2×√2)R45° reconstruction. Here, pairs of surface FeB and neighboring O ions are slightly displaced laterally, forming undulating rows with two inequivalent FeA bulk continuation sites. We term these narrow and wide sites, respectively. The most common surface defects, adsorption of simple molecules, and various meta-stable Fe-rich terminations will be described. We will illustrate the pathway that lead us to the discovery of the unique adsorption property of this reconstructed (√2×√2)R45° surface. We found that, at fractional monolayer coverage and at RT, this surface acts as a robust adsorption template for single atoms. This was tested with H, Fe, Au, Pd, Ag, Ni, Sr, and Co; all these elements adsorb as
Date: Tue, 24.09.2013
Time: 16:00
Location:Technische Universität Wien, Institut für Angewandte Physik, Seminarraum 134A, Turm B (gelbe Leitfarbe), 5. OG, 1040 Wien, Wiedner Hauptstraße 8-10
Contact:Univ.Prof. Dr. Ulrike Diebold