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Accueil du site > Séminaires > Archives séminaires > Séminaires 2012 > Séminaire MSC lundi 15 octobre 2012 à 11h30. Erik Weeks (Emory University/USA) : "Colloidal liquids and glasses : Insights from microscopy".

Séminaire MSC lundi 15 octobre 2012 à 11h30. Erik Weeks (Emory University/USA) : "Colloidal liquids and glasses : Insights from microscopy"

Sauf mention contraire, les séminaires et les soutenances se déroulent à 11h30 en salle 454A du bâtiment Condorcet.


Colloidal liquids and glasses : Insights from microscopy

Erik R. Weeks : Emory University, Atlanta Georgia USA

(webpage)

Abstract : What would we learn if we could clearly see individual atoms deep inside materials ? My group studies colloidal suspensions, which are solid micron-sized particles in a liquid. In many ways, these particles are analogous to atoms. At high particle concentration, the sample is a good model system for a glassy material, with the particles randomly packed together. We use an optical confocal microscope to view the motion of these colloidal particles in three dimensions to see how the motion is changed as the glass transition is approached. In particular, we will discuss two puzzles. First, we’ll examine how rotational and translational diffusion of tracers differ as the glass transition is approached. Second, we’ll study how how the behavior of glassy samples change when they are confined, and how this depends on the nature of the confining boundaries.


Contact : Équipe séminaires / Seminar team - Published on / Publié le 21 septembre 2012


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