Regensburg 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: Glasses and Glass Transition I (joint session DY/CPP)
CPP 5.6: Vortrag
Montag, 11. März 2013, 16:30–16:45, H34
Temporal evolution of structural and dynamical heterogeneities in a metastable colloidal fluid — •Sebastian Golde1,2, Markus Franke2, and Hans Joachim Schöpe2,3 — 1Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany — 2Johannes Gutenberg-Universität Mainz, Institut für Physik, Staudinger Weg 7, 55099 Mainz, Germany — 3MPI für Polymerforschung, Postfach 3148, 55021 Mainz, Germany
An interesting property of the metastable melt is that it exhibits spatial heterogeneous dynamics [1]. The dynamics can be understood as an accumulation of mobile and immobile particles. Recent work suggested that the local structure and dynamics of the metastable melt are correlated to each other [2]. In order to investigate these phenomena we used a hard sphere like colloidal model system. The local dynamics in the metastable colloidal melt were measured with our recently new designed multispeckle correlation spectroscopy setup which performs space- as well as time-resolved dynamic light scattering. The solidification kinetics was measured using an advanced time-resolved laser light Bragg scattering setup. The correlation between the particle dynamics and the solidification kinetics could be quantified by analyzing the temporal evolution of the local particle dynamics, the ensemble averaged dynamic structure factor and the solidification kinetics. Crossing the glass transition point we can show that there is fundamental link between crystallization and vitrification. [1] L. Berthier and G. Biroli, Rev. Modern Physics 83 (2011),[2] T. Kawasaki and H. Tanaka, JCPM 22 (2010)