Particle tracking in complex materials - Phytem

ENS Cachan - 61 avenue du Président Wilson 94230 Cachan
CONFÉRENCES DU DÉPARTEMENT DE
PHYSIQUE
Auditorium Chemla à 13h15
Mardi 29 novembre 2016
Bérengère ABOU
Laboratoire Matière et Systèmes Complexes, UMR CNRS 7057
Université Paris Diderot, France
Particle tracking in complex
materials
Résumé :
I will give three examples of particle tracking in complex materials:
- Particle tracking microrheology in the beetle secretion (adhesion mechanism in insects)
- Particle tracking microrheology in the jellyfish (morphogenesis)
- Dynamical heterogeneities in dense colloids (glass transition)
Left: micrometric secretion droplets from the beetle, spread on a glass slide.
The microneedle is used to collect the secretion using capillary effects. Right: dense thermosensitive
colloids below the glass transition.
Pour tout renseignement contacter Mélanie LEBENTAL
Tél : 01 47 40 55 58 e-mail : [email protected]
B. Abou, C. Gay, B. Laurent, O. Cardoso, D. Voigt, H. Peisker & S. Gorb, Extensive collection of
femtolitre pad secretion droplets in the beetle Leptinotarsa decemlineata allows nanolitre microrheology,
J. R. Soc. Interface 7, 1745 (2010).
C. Gambini, B. Abou, A. Ponton & A. Cornelissen, Micro and macro rheology of jellyfish in extracellular
matrix, Biophys. Journ. 102, 1 (2012).
R. Colin, A. Al-Sayed, J.-C. Castaing, R. Goyal, L. Hough & B. Abou, Spatially heterogeneous dynamics
in a thermosensitive soft suspension before and after the glass transition, Soft Matter 7, 4504 (2011)
R. Colin, A. M. Alsayed, C. Gay & B. Abou, Questioning the relationship between the χ4 susceptibility
and the dynamical correlation length in a glass former Soft Matter 11, 9020 (2015).
Pour tout renseignement contacter Mélanie LEBENTAL
Tél : 01 47 40 55 58 e-mail : [email protected]