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(119) Production(s) de LIGOURE C.
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Temporal heterogeneity of the slow dynamics of a colloidal paste
Auteur(s): Ballesta P, Ligoure C., Cipelletti L.
Conference: 3rd International Symposium on Slow Dynamics in Complex Systems (Sendai, JP, 2003-11-03)
Actes de conférence: SLOW DYNAMICS IN COMPLEX SYSTEMS, vol. 708 p.68-71 (2004)
Résumé: We investigate the slow dynamics of a soft glass, a concentrated suspension of polydisperse colloidal particles, by using multispeckle Diffusing Wave Spectroscopy (DWS). Two distinct regimes are observed: for small sample age, t(w), the dynamics smoothly slows down, as revealed by a nearly linear increase of the characteristic relaxation time, tau(s), measured by DWS. At longer ages, the dynamics is quasi stationary, but tau(s) exhibit anomalously large fluctuations in time. The time scale of the dynamical fluctuations is found to be slightly shorter than the average relaxation time. The variance of the intensity correlation function is maximum for time delays comparable to the average relaxation time, in striking analogy with recent simulations of glass-forming liquids.
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Bending elasticity of a curved amphiphilic film decorated anchored copolymers: a small angle neutron scattering study. 
Auteur(s): Appell Jacqueline, Ligoure C., Porte Grégoire
(Article) Publié:
Journal Of Statistical Mechanics: Theory And Experiment, vol. --- p.P08002 (2004)
Texte intégral en Openaccess : 
Ref HAL: hal-00002158_v1
Ref Arxiv: cond-mat/0406762
DOI: 10.1088/1742-5468/2004/08/P08002
WoS: 000227301600002
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
12 Citations
Résumé: Microemulsion droplets (oil in water stabilized by a surfactant film) are progressively decorated with increasing amounts of poly ethylene- oxide (PEO) chains anchored in the film by the short aliphatic chain grafted at one end of the PEO chain . The evolution of the bending elasticity of the surfactant film with increasing decoration is deduced from the evolution in size and polydispersity of the droplets as reflected by small angle neutron scattering. The optimum curvature radius decreases while the bending rigidity modulus remains practically constant. The experimental results compare well with the predictions of a model developed for the bending properties of a curved film decorated by non-adsorbing polymer chains, which takes into account, the finite curvature of the film and the free diffusion of the chains on the film.
Commentaires: 30 June 2004
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Hairy self-assemblies of surfactants.
Auteur(s): Ligoure C.
Conférence invité: International workshop on Physics of soft matter composites (Tokyo, JP, 2004-11-29)
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Sédimentation of strongly attractive gels.
Auteur(s): Ligoure C.
(Séminaires)
Center of Soft Matter Physics - University Tokyo Ochinamuzu (Tokyo, Japan, FR), 2004-00-00 |
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Hairy self-assemblies of surfactants.
Auteur(s): Ligoure C.
(Séminaires)
University Rovira i Virgili. (Tarragona, Spain, FR), 2004-00-00 |
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Wet micelles of charged block copolymers at equilibrium
Auteur(s): Morel Alain, In M., Ligoure C., Cottet H., Deroo S., Destarac M.
(Affiches/Poster)
40ème Congrès Mondial sur les Macromolécules (IUPAC MACRO 2004) (Paris, France, FR), 2004-07-15 |
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Wet micelles of charged block copolymers at equilibrium.
Auteur(s): Morel Alain, In M., Ligoure C., Cottet H., Deroo S., Destarac M.
Conférence invité: 40ème Congrès Mondial sur les Macromolécules IUPAC (Paris, France, FR, 2004)
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