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6 papers · 2 filters
How colloidal suspensions that age are rejuvenated by strain application
V. Viasnoff, S. Jurine, F. Lequeux
We present here a microscopic study of the effect of shear on a dense purely repulsive colloidal suspension. We use Multispeckle Diffusing Wave Spectroscopy to monitor the transien…
Partial rejuvenation of a colloidal glass
F. Ozon, T. Narita, A. Knaebel +3
We study the effect of shear on the aging dynamics of a colloidal suspension of synthetic clay particles. We find that a shear of amplitude reduces the relaxation time measured…
Structural changes in block copolymers: coupling of electric field and mobile ions
Yoav Tsori, Francois Tournilhac, David Andelman +1
We consider the coupling between an external electric field and dissociated ions embedded in anisotropic polarizable media such as block copolymers. We argue that the presence of s…
A simple model for heterogeneous flows of yield stress fluids
G. Picard, A. Ajdari, L. Bocquet +1
Various experiments evidence spatial heterogeneities in sheared yield stress fluids. To account for heterogeneities in the velocity gradient direction, we use a simple model corres…
Wormlike chain or tense string? A question of resolution
J. -B. Fournier
It is shown that a wormlike chain, i.e., a filament with a fixed contour-length S and a bending elasticity kappa, attached to a frame of length L, can be described--at low resoluti…
Exact calculations of the paranematic interaction energy for colloidal dispersions in the isotropic phase of a nematogenic material
J. -B. Fournier, P. Galatola
In a recent paper [Phys. Rev. E 61, 2831 (2000)], Borstnik, Stark and Zumer have studied the stability of a colloidal dispersion of micron-sized spherical particles in the isotropi…