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Thème : Jamming, plasticity and material failure
Présentation
The constituents of jammed and glassy soft materials are so densely packed and/or so tightly bound that their microscopic dynamics are orders of magnitude slower than in dilute systems. Examples of such materials include, among others, concentrated colloidal suspensions or emulsions, polymer or particle gels, surfactant phases, foams. Our research focuses on the spontaneous (e.g. due to thermal energy) dynamics of these materials, as well as on their behavior in response to an external drive, e.g. a mechanical or thermal forcing.
We leverage on our expertise in the formulation of well-defined supramolecular systems with original properties, combined with home-designed devices allowing a thorough characterization of the structure and dynamics of the system and a fine control of the imposed drive.
– MATERIAL FAILURE, click !
– THE GLASS TRANSITION OF SOFT COLLOIDS, click !
– VISCOUS, VISCOELASTIC, AND ELASTIC SHEETS, click !
Fractures propagating in a dense corn starch suspension. The suspension is confined between two parallel plates separated by a thin gap. The fracture is caused by the fast injection of solvent, at a point about 3 cm from the field of view. The field of view is about 1 cm2. The sample is illuminated using laser light : the temporal fluctuations of the resulting speckle patter carry information on the microscopic dynamics and the velocity field. By Frederic Lechenault, Serge Mora and Luca Cipelletti.
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Dernières publications
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Role of molecular damage in crack initiation mechanisms of tough elastomers  Auteur(s): Ju Jianzhu, Sanoja Gabriel, Cipelletti L., Ciccotti Matteo, Zhu Bangguo, Narita Tetsuharu, Yuen Hui Chung, Creton Costantino (Article) Publié: Proceedings Of The National Academy Of Sciences Of The United States Of America, vol. 121 p.e2410515121 (2024) |
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X-ray Reflectivity Probing the Structural Evolution of Sunflower Proteins Adsorbed at the Air–Water Interface Auteur(s): Yuan Guangcui, Satija Sushil, Ramos L., Banc A. (Article) Publié: Langmuir, vol. 40 p.25285-25294 (2024) |
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Phosphorylation of the F-BAR protein Hof1 drives septin ring splitting in budding yeast Auteur(s): Varela Salgado Maritzaida, Adriaans Ingrid, Touati Sandra, Ibanes Sandy, Lai-Kee-Him Joséphine, Ancelin Aurélie, Cipelletti L., Picas Laura, Piatti Simonetta
(Article) Publié:
Nature Communications, vol. 15 p.3383 (2024)
Texte intégral en Openaccess : |
Material failure
Material failure
1. Dynamic precursors of material failure in the creep of a colloidal gel. People involved : S. Aime (PhD), C. Ligoure (Pr), L. Ramos (DR CNRS), L. Cipelletti (Pr)
We study (…)
The glass transition of soft colloids
The glass transition of soft colloids
People involved : A.-M. Philippe (Postdoc), D. Truzzolillo (CR CNRS), L. Berthier (DR CNRS), L. Cipelletti (Pr).
We use a combination of light and X-ray (…)
Viscous, viscoelastic, and elastic sheets
Viscous, viscoelastic, and elastic sheets People involved : S. Arora (PhD), C. Ligoure (Pr.), L. Ramos (DR. CNRS) T. Phou (IE), J-M Fromental (IE), collaboration with S. Mora (Pr - LMGC)
The (…)
