Prof. Dr. Thomas Palberg "To Make a Glass - Avoid the Crystal"
Institute of Physics, University of Mainz, Germany
What |
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When |
Jun 15, 2016 from 02:15 PM to 03:00 PM |
Where | Seminarraum A, FMF, Stefan-Meier-Str. 21, Freiburg |
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Colloidal model systems allow for a flexible tuning of particle sizes, particle spacing and mutual interactions at constant temperature. Colloidal suspensions typically crystallize as soon as the interactions get sufficiently strong and long-ranged. Several strategies have been successfully applied to avoid crystallization and instead produce colloidal glasses. Most of these amorphous solids are formed at high particle concentrations. This talk shortly reviews our own attempts to produce amorphous colloidal solids using strategies based on topological, thermodynamic and kinetic considerations. We also suggest another strategy for producing (transient) amorphous solids in a dilute aqueous suspension of highly charged spheres at low salt concentration, possibly the first observation of a genuine Wigner-glass.
invited by Eckhard Bartsch