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Résumé |
Dense colloidal suspensions are an ideal model system to study the glass transition. With increasing volume fraction, the suspension dynamics experiences a slowing down of several orders of magnitude, as well as a change of qualitative behavior, from viscous to elastic, at reasonable experimental time scales, and with no significant structural changes. I will present recent results about aging and dynamic heterogeneities in thermosensitive suspensions of pNIPAm microgels. The particles radius in the suspension, and therefore their volume fraction, can be reversibly tuned with temperature, which provides a unique way to explore the phase behavior on the same sample. |
