Calendar of Physics Talks Vienna

Graphene interfaces: CVD growth on Ni, Y2O3-monolayer, and interface charge doping
Speaker:Matthias Batzill (Dept. of Physics, University of South Florida, Tampa/USA)
Abstract:In this presentation I discuss CVD growth and interface properties of graphene studied by electron spectroscopy (XPS, AES, UPS) and microscopy (LEEM, STM). The first part of my talk focuses on (monolayer) graphene growth on nickel surfaces in vacuum by chemical vapor deposition. We discuss the growth modes as a function of growth temperatures and competing carbon containing surface phases and illustrate the synthesis of periodic, linear 1D-defects embedded in graphene. The second part discusses interfaces between metal/graphene/oxide sandwich structures. We demonstrate that yttria (Y2O3) forms a complete wetting layer on metal-supported graphene and may even form a crystalline well-ordered film on graphene. Using x-ray photoemission spectroscopy (XPS) we demonstrate variation in charge doping of graphene depending on the combination of the metal and the oxide between the graphene-layer
Date: Mon, 07.07.2014
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