Calendar of Physics Talks Vienna

Structure and dynamics of water at interfaces: “Surfing” water droplets and ice formation
Speaker:Angelos Michaelides (Thomas Young Centre, University College London, UK)
Abstract:Water/solid interfaces are relevant to a broad range of physicochemical phenomena and technological processes such as corrosion, lubrication, heterogeneous catalysis and electrochemistry (Nature Mater 11, 667 (2012)). In this talk some of our recent computer simulation work in this area will be covered. Specifically results on water droplet diffusion on the surfaces of layered materials will be presented and a novel “surfing” mechanism for droplet diffusion discussed (Nature Mater, in press). In addition, simulations of ice nucleation on various nanoparticles with different physiochemical characteristics will be presented and the fundamental insight obtained from these into heterogeneous ice nucleation discussed (J. Am. Chem Soc., in press). Time permitting some recent ab initio molecular dynamics results at wet interfaces in which rapid proton transfer is observed will also be discussed.
Date: Mon, 16.11.2015
Time: 17:30
Location:TU Wien-Freihaus, Hörsaal 5, 2. Stock, grüner Bereich
Contact:Prof. Diebold

Optical super-resolution microscopy - deeper insights into membrane bioactivity
Speaker:Prof. Christian Eggeling (MRC Human Immunology Unit & Wolfson Imaging Centre Oxford, Weatherall Institute of Molecular Medicine, University of Oxford, Headley Way, Oxford, OX3 9DS, United Kingdom, christian.eggeling@rdm.ox.ac.)
Abstract:Molecular interactions in the plasma membrane of living cells are key in cellular signalling. Protein-protein or protein-lipid complexes, the formation of lipid nanodomains (often denoted “rafts”), or diffusional restrictions by the cortical cytoskeleton are considered to play a functional part in a whole range of membrane-associated processes. The direct and non-invasive observation of such interactions in living cells is often impeded by principle limitations of conventional far-field optical microscopes, specifically with respect to limited spatio-temporal resolution. We present how novel details of molecular membrane dynamics can be obtained by using advanced microscopy approaches such as the combination of super-resolution STED microscopy with fluorescence correlation spectroscopy (STED-FCS). We will focus on new insights into the lipid “raft” theory, and on the role of plasma membr
Date: Tue, 17.11.2015
Time: 16:00
Location:Technische Universität Wien, Institut für Angewandte Physik, E134 yellow tower „B“, 5th floor, Seminarraum 134A (room number DB05L03) 1040 Wien, Wiedner Hauptstraße 8-10
Contact:Prof. Dr. Gerhard Schütz

Sterile neutrino oscillation with altered dispersion relations in cosmology and astrophysics
Speaker:Elke Aeikens (Univ. Wien)
Abstract:im Rahmen des Teilchenphysikseminars
Date: Tue, 17.11.2015
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:A. Hoang, W. Grimus

Transition to turbulence in pipe flow
Speaker:Prof. Dr. Björn Hof
Date: Tue, 17.11.2015
Time: 17:30
Duration: 60 min
Location:Lise-Meitner Hörsaal (ehemal. Großer Hörsaal der Experimentalphysik), Universität Wien
1090 Wien, Strudlhofgasse 4 / Boltzmanngasse 5

High-accuracy methods for black-hole perturbations: quasi-normal-modes filtering
Speaker:Marcus Ansorg (Jena)
Abstract:Im Rahmen des Literaturseminars: In this talk I will present a spectral decomposition of solutions to relativistic wave equations on a given Schwarzschild-black-hole background. To this end, the wave equation is Laplace-transformed which leads to a spatial differential equation with a complex parameter. This equation is treated in terms of a sophisticated Taylor series analysis. Thereby, all ingredients of the desired spectral decomposition arise explicitly, including quasi normal modes, quasi normal mode amplitudes and the jump along the branch cut. Finally, all contributions are put together to obtain via the inverse Laplace transformation the spectral decomposition in question.
Date: Thu, 19.11.2015
Time: 14:00
Duration: 60 min
Location:Arbeitsgruppe Gravitation, Währinger Strasse 17, Seminarraum, 5. Stock, 1090 Wien
Contact:P.T. Chrusciel