Nanoscale Caterpillars or How to Achieve Complex Motion with Random Sticky Feet ?
Lundi 6 janvier 2020 14:00
- Duree : 1 heure
Lieu : Conference room - LIPhy - Bât E - 140 Avenue de la Physique - St Martin d’Hères. Accès par interphone, appeler le secrétariat
Orateur : Sophie MARBACH (Courant Institute for Mathematical Sciences, New York University, NY, USA)
Beating equilibrium diffusion is a paradigm challenge that biological or artificial systems of small particles have to face to achieve complex functions. Some cells (like leucocytes) use ligand-receptor contacts (sticky feet) to crawl and roll along vessels. Sticky DNA (another type of sticky feet) is coated on colloids to design programmable interactions and long-range assembly features. First of all, the equilibrium characteristics of sticky feet are quite entangled since a number of different forces control adhesion. Second, the dynamics of such sticky motion are intricate as sticky events (attaching/detaching) often occur on very short time scales compared to the overall motion of the particle. This makes predictions of equilibrium and dynamic properties highly challenging. Here I will fully rationalize what parameters control both equilibrium and dynamic (diffusion and sub-diffusion) properties and compare them to existing systems.
Contact : cyril.picard@univ-grenoble-alpes.fr
Discipline évènement : (Physique)
Entité organisatrice : (LIPhy)
Nature évènement : (Séminaire)
Evènement répétitif : (Séminaire Mat. Molle/grise)
Site de l'évènement : Domaine Universitaire de St Martin d’Hères
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