Accueil >
Production scientifique
![](plugins/kitcnrs-5.4.1/css/charte-2/img/boite-outils/icones/postdco.gif)
![](https://hal.archives-ouvertes.fr/img/tamponHal.png)
Matière Molle
(423) Articles dans des revues
![--------------------](plugins/aigle//images/filet-couleur.gif)
|
|
Tank treading and unbinding of deformable vesicles in shear flow: determination of the lift force.
Auteur(s): Abkarian M., Lartigue Colette, Viallat Annie
(Article) Publié:
Physical Review Letters, vol. 88 p.068103 (2002)
PMID 11863856
Résumé: Deformation and tank-treading motion of flaccid vesicles in a linear shear flow close to a wall are quantitatively studied by light microscopy. Velocities of bounded vesicles obey Goldman's law established for rigid spheres. A progressive tilt and a transition of unbinding of vesicles are evidenced upon increasing the shear rate, gamma;. These observations disclose the existence of a viscous lift force, F(l), depending on the viscosity eta of the fluid, the radius R of the vesicle, its distance h from the substrate, and a monotonous decreasing function f(1-v) of the reduced volume v, in the following manner: F(l) = eta(gamma)(R(3)/h)f(1-v). This relation is valid for vesicles both close to and farther from the substrate.
|
![--------------------](plugins/aigle//images/filet-couleur.gif)
|
|
Universal aging features in the restructuring of fractal colloidal gels
Auteur(s): Cipelletti L., Manley S, Ball Rc, Weitz Da
(Article) Publié:
Physical Review Letters, vol. 84 p.2275-2278 (2000)
Résumé: We use multispeckle dynamic light scattering to measure the dynamic structure factor, f(q, tau), of gels formed by aggregation of colloids. Although the gel is an elastic solid, f(q, tau) nearly completely decays on long time scales, with an unusual form, f(q, tau) similar to exp{-(tau/tau(f))(mu)}, with mu approximate to 1.5 and with tau(f) proportional to q(-1) A model for restructuring of the gel with aging correctly accounts for this behavior. Aging leads to a dramatic increase in tau(f) however, all data can be scaled on a single master curve, with tau(f) asymptotically growing linearly with age. This behavior is strikingly similar to that predicted for aging in disordered glassy systems, offering convincing proof of the universality of these concepts.
|
![--------------------](plugins/aigle//images/filet-couleur.gif)
|
|
Molecular design of sol-gel derived hybrid organic-inorganic nanocomposites ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Sanchez C., Lebeau B., Ribot François, In M.
(Article) Publié:
Journal Of Sol-Gel Science And Technology, vol. 19 p.31-38 (2000)
Texte intégral en Openaccess : ![istex](plugins/aigle//images/logo-istex.png)
|