Partenaires

MSC
Logo CNRS Logo Université Paris Diderot
Logo tutelle Logo tutelle


« October 2014 »
M T W T F S S
29 30 1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31 1 2

Search

On this website

On the whole CNRS Web


Home page > Annuaire > ABOU Bérengère.

ABOU Bérengère

Contact - Room: 712A

GIF - 732.3 kb

Chargée de recherche - CNRS

berengere.abou(at)univ-paris-diderot.fr

Bâtiment Condorcet, Bureau 712A (76257), Labo 590A (76161)

Internship 2014-2015 / PhD: Measuring dynamical spatial correlation length in soft glass

Supervisor: Bérengère Abou

berengere.abou(at)univ-paris-diderot.fr


Understanding the glass transition in materials and their out-of-equilibrium dynamics remains a challenge in condensed-matter physics. Over the last 15 years, dynamical heterogeneities (DHs) have been recognized as a promising and exciting feature to understand slow relaxation processes in glass-forming systems. DHs are characterized by fast and slow clusters of dynamically correlated particles, coexisting in the material, with the idea that a dynamical correlation length ― representing the clusters size ― would diverge when approaching the glass transition.

In practice, glass transitions are observed in various systems, such as molecular liquids, colloids or granular materials. Among all, dense colloids are model systems with a glass transition at ambient temperature when increasing volume fraction. They display slow accessible timescales and can be probed with simple optical techniques.

During this internship, we will investigate dynamic heterogeneities in soft thermosensitive colloids ( 1 µm) when approaching the glass transition. We will perform (i) particle tracking, (ii) image correlation analysis to measure the dynamical spatial correlation length increase when approaching the glass

fast (red) and slow (blue) domains coexisting in dense soft thermosensitive colloids

Thermosensitive dense colloidsThe candidate will benefit from excellent collaborations with the theoretical group in the institute, and collaboration with the industrial group Solvay (COMPASS, USA).


R. Colin, Ahmed M. Alsayed, 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).

Experimental techniques: particle tracking, image correlation, microrheology, dynamic light scattering, image analysis (ImageJ)

Keywords

Materials and Soft Matter, Dynamics of Out-of-Equilibrium Systems, Multiscale dynamics, mechanics and rheology, Magnetic particles, liquids or materials, responsive materials, Out of equilibrium dynamic systems and nonlinear physics, ABOU Bérengère, Proposition de stage ou de thèse


Contact : Published on / Publié le 9 November 2013



Research Topics


General keyword

Teams

Keywords

If some information on this page is erroneous or missing (for instance the list of research topics), please contact the web team (lab-msc-web AT listes.sc.univ-paris-diderot.fr).