Regensburg 2016 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 35: Activated and Glassy Dynamics of Soft Matter (joint session CPP/DY, organized by CPP)
CPP 35.3: Talk
Wednesday, March 9, 2016, 10:00–10:15, H51
Picosecond Dynamics of Liquid Glycerol Above Tg — •Sebastian Busch1, Alessandro Vispa2, Nicolas Giovambattista3, and Luis Carlos Pardo2 — 1German Engineering Materials Science Centre (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Geesthacht GmbH, Lichtenbergstr. 1, 85747 Garching bei München, Germany — 2Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Barcelona, Spain — 3Physics Department, Brooklyn College of The City University of New York, Brooklyn, USA
An understanding of the dynamics of glass-forming liquids at temperatures significantly above the glass transition still represents a much-coveted goal. If any theory or explanation is to be extrapolated to understand the undercooled regime from knowledge of high-temperature equilibrium states, a consensus must first exist on the underlying physics of the liquid phase at temperatures above the glass transition.
The aim of this work is to provide a detailed and critical appraisal of two specific questions about the dynamics of liquid glycerol, a prototypical glass-forming liquid: The first one concerns how many distinct dynamical processes are present in glycerol in the sub-nanosecond regime. The second one concerns whether a homogeneus (dynamically driven) or heterogeneous (structurally driven) scenario better describes Quasielastic Neutron Scattering data and Molecular Dynamics simulations.
A. Vispa et al., "A Robust Comparison of Dynamical Scenarios in a Glass-forming Liquid", PhysChemChemPhys, accepted.