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6 papers · 2 filters
Soft Listeria: actin-based propulsion of liquid drops
Hakim Boukellal, Otger Campàs, Jean-François Joanny +2
We study the motion of oil drops propelled by actin polymerization in cell extracts. Drops deform and acquire a pear-like shape under the action of the elastic stresses exerted by…
Fluctuation spectrum of fluid membranes coupled to an elastic meshwork: jump of the effective surface tension at the mesh size
Jean-Baptiste Fournier, David Lacoste, Elie Raphael
We identify a class of composite membranes: fluid bilayers coupled to an elastic meshwork, that are such that the meshwork's energy is a function \textit{not}…
Effective interactions between inclusions in complex fluids driven out of equilibrium
Denis Bartolo, Armand Ajdari, Jean-Baptiste Fournier
The concept of fluctuation-induced effective interactions is extended to systems driven out of equilibrium. We compute the forces experienced by macroscopic objects immersed in a s…
Parallel and Perpendicular Lamellae on Corrugated Surfaces
Yoav Tsori, David Andelman
We consider the relative stability of parallel and perpendicular lamellar layers on corrugated surfaces. The model can be applied to smectic phases of liquid crystals, to lamellar…
Elastic interaction between "hard'' or "soft" pointwise inclusions on biological membranes
Denis Bartolo, Jean-Baptiste Fournier
We calculate the induced elastic-interaction between pointwise membrane inclusions that locally interact up to quadratic order with the membrane curvature tensor. For isotropic inc…
Orienting Ion-Containing Block Copolymers Using AC Electric Field
Y. Tsori, F. Tournilhac, L. Leibler
We consider orientation mechanisms for block copolymers in an electric field. Theoretical and experimental studies have shown that nonuniformity of the dielectric constant gives ri…