Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 1: Colloids and Complex Liquids I (joint session CPP, BP, DY)
CPP 1.6: Vortrag
Montag, 16. März 2015, 10:45–11:00, C 130
Experimental determination of structural and dynamical heterogeneities in a metastable colloidal fluid — Sebastian Golde1, Markus Franke2, Thomas Palberg3, and •Hans Joachim Schöpe4 — 1Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany — 2DB Systel GmbH, Weilburger Straße 22 B4.14, 60326 Frankfurt a. Main — 3Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55128 Mainz, Germany — 4Eberhards Karls Universität Tübingen, Auf der Morgenstelle 10, 72026 Tübingen, Germany
Metastable fluids exhibit heterogeneous dynamics as well as heterogeneous structure [1]. These dynamical and structural heterogeneities play an important role in the understanding of the glass transition and crystallization. Simulations suggest that these heterogeneities in dynamics and structure are linked, but the direct experimental proof is still lacking [2]. Using space- and time-resolved dynamic light scattering and time-resolved multi angle static light scattering [3], we study the dynamics and structure in a model system of colloidal hard spheres during crystallization and vitrification. For the first time, direct correlation between the temporal evolution of the dynamical heterogeneities and the structural heterogeneities was obtained from an analysis of the subensemble resolved particle dynamics and the evolution of the static structure factor.
[1] L. Berthier and G. Biroli, Rev.s of Mod. Phys., 83, (2011,[2] T. Kawasaki and H. Tanaka, JPCM, 22 (2010),[3] M. Franke, S. Golde and H.J. Schöpe, Soft Matter 10, 5380 (2014)