@article{Johner1991, title = {Diblock copolymers in selective solvents}, author = {A. Johner and J. F. Joanny and C. Marques}, day = {15}, journal = {Physica A: Statistical and Theoretical Physics}, month = {Mar}, number = {1-2}, pages = {285--289}, url = {http://www.sciencedirect.com/science/article/B6TVG-46TY4MR-23/1/0825174a4221977bcef7e893c6dd6873}, volume = {172}, year = {1991}, biburl = {http://www.bibsonomy.org/bibtex/2a053d638fa5edd84c38afc81b14051c3/smicha}, description = {Physica A}, keywords = {imported } } @article{Joanny1987, title = {Bursting of a soap film in a viscous environment}, author = {J. F. Joanny and P. G. De Gennes}, day = {02}, journal = {Physica A: Statistical and Theoretical Physics}, month = {Nov}, number = {1-2}, pages = {238--255}, url = {http://www.sciencedirect.com/science/article/B6TVG-46G5SHY-2X/1/973fe29d67b9f86df3693dd7019c7067}, volume = {147}, year = {1987}, biburl = {http://www.bibsonomy.org/bibtex/25f484264f3e4476faa71f01c6659a245/smicha}, description = {Physica A}, keywords = {imported } } @incollection{statphys23_1086, title = {Dynamin as a molecular motor: a thermodynamic study}, address = {Genova, Italy}, author = {M. Lenz and J.F. Joanny and J. Prost}, booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics}, editor = {Luciano Pietronero and Vittorio Loreto and Stefano Zapperi}, month = {9-13 July}, url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=1086}, year = {2007}, biburl = {http://www.bibsonomy.org/bibtex/2923a24d50839e1869fc99f92073b5eb2/statphys23}, abstract = {Dynamin is a GTPase implicated in the severing of cell membrane during endocytosis. Recent in vitro experiments have shown that it is a molecular motor: when polymerized in a helical shape around a membrane nanotube, it can drag a polystyrene bead along with its rotation and form supercoils. We model the dynamin-membrane assembly in order to extract information from this and future experimental data about the mechanical mode of action of dynamin, a topic still under debate. Our first results concern the long dynamin/membrane tubes used in in vitro experiments: their dynamics is dominated by the relaxation of the membrane and dynamin helix deformations through helix-membrane friction. Little is known about this mechanism on the molecular level, but our coarse-grained out-of-equilibrium thermodynamical approach allows us to characterize it. This model and data from ongoing experiments in Institut Curie should allow us to know more about the role of dynamin in endocytosis.}, keywords = {dynamin interaction molecular motors protein-membrane statphys23 topic-10 } } @article{vilgis00b, title = {Polyelectrolyte gels in poor solvent: Elastic moduli}, author = {T. A. Vilgis and A. Johner and J.-F. Joanny}, journal = {Eur. Phys. J. E}, number = {3}, pages = {237--244}, volume = {3}, year = {2000}, biburl = {http://www.bibsonomy.org/bibtex/2713ff96428f7ad1e37298b1ffe523754/kaigrass}, abstract = {We study theoretically using scaling arguments the behavior of polyelectrolyte gels in poor solvents. Following the classical picture of Katchalsky, our approach is based on single chain elasticity but it accounts for the recently proposed pearl-necklace structure of polyelectrolytes in poor solvents. The elasticity both of gels at swelling equilibrium and of partially swollen, non equilibrium, gels is studied when parameters such as the ionic strength or the fraction of charged monomers are varied. Our theory could be useful to interpret recent experiments performed in Strasbourg that show that if identical gel samples are swollen to the same extent at different pH the sample with the highest charge has the lowest shear modulus.}, keywords = {imported } } @article{vilgis00a, title = {Stretching necklaces}, author = {T. A. Vilgis and A. Johner and J.-F. Joanny}, journal = {Eur. Phys. J. E}, number = {3}, pages = {289--300}, volume = {2}, year = {2000}, biburl = {http://www.bibsonomy.org/bibtex/2702ba69df56383cf8d38ff36d85953a5/kaigrass}, abstract = {Polyelectrolytes in poor solvents show a necklace structure where collapsed polymer pearls are linked to stretched strings. In the present paper the elasticity of such chains is studied in detail. Different deformation regimes are addressed. The first is the continuous regime, where many pearls are present. A continuous force extension relation ship is calculated. The main contribution comes from the tension balance and the electrostatic repulsion of consecutive pearls. The main correction term stems from the finite size of the pearls, which monitors their surface energy. For a finite amount of pearls discontinuous stretching is predicted. Finally counterion effects are discussed qualitatively.}, keywords = {imported } } @article{sens00a, title = {Counterion release and electrostatic adsorption}, author = {P. Sens and J. F. Joanny}, journal = {Phys. Rev. Lett.}, number = {21}, pages = {4862--4865}, volume = {84}, year = {2000}, biburl = {http://www.bibsonomy.org/bibtex/2fac9c46465fdac3a1abdfb100da9318a/kaigrass}, abstract = {The effective charge of a rigid polyelectrolyte (PE) approaching an oppositely charged surface is studied. The eases of a weak (annealed) and strongly charged PE with condensed counterions (such as DNA) are discussed. In the most interesting case of the adsorption onto a substrate of low dielectric constant (such as a lipid membrane or a mica sheet) the condensed counterions are and always released as the PE approaches the substrate, because of the major importance of the image-charge effect. For the adsorption onto a surface with freely moving charges, the image-charge effect becomes less important and full release is often expected.}, keywords = {absorption, counterion polyelectrolyte release } } @article{rubinstein96a, title = {Elastic modulu{S} And Equilibrium Swelling Of Polyelectrolyte Gels}, author = {M. Rubinstein and R. H. Colby and A. V. Dobrynin and J. F. Joanny}, journal = {Macromolecules}, number = {1}, pages = {398--406}, volume = {29}, year = {1996}, biburl = {http://www.bibsonomy.org/bibtex/2ee7b07b8a0dd19dbb7d2dea2594851c4/kaigrass}, abstract = {We present a scaling theory for the modulus G of polyelectrolyte gels as a function of strand length between cross-links, monomer concentration c, salt concentration c(s), and preparation conditions (monomer concentration c(0) and salt concentration c(s)(0)). The theory assumes affine displacement of the junction points when the concentration is changed. With no added salt (c(s) = c(s)(o) = 0), we predict a new concentration dependence of the modulus G similar to c(5/6). In the high-salt limit, we predict the usual concentration dependence for uncharged polymers but a novel dependence on salt concentration, G similar to c(7/12)c(s)(1/4). We also predict the modulus to decrease as charge is added to the gel strands. The predicted effects of added salt and charge on modulus have recently been observed by Candau and co-workers. At low concentrations, we discuss the strong stretching of network strands and its effect on modulus and equilibrium swelling.}, keywords = {imported } } @article{raphael90a, title = {Annealed And Quenched Polyelectrolytes}, author = {E. Raphael and J. F. Joanny}, journal = {Europhys. Lett.}, pages = {4926}, volume = {13}, year = {1990}, biburl = {http://www.bibsonomy.org/bibtex/2d8f542a8ea78300568b455ba89dfef14/kaigrass}, keywords = {imported } } @article{netz99d, title = {Complexation between a semiflexible polyelectrolyte and an oppositely charged sphere}, author = {R. R. Netz and J. F. Joanny}, journal = {Macromolecules}, pages = {9026--9040}, volume = {32}, year = {1999}, biburl = {http://www.bibsonomy.org/bibtex/26c2b9330dd8311af732a57136435d10f/kaigrass}, keywords = {imported } } @article{joanny79a, title = {Effects of Polymer-Solutions on Colloid Stability}, author = {J. F. Joanny and L. Leibler and P. G. {de Gennes}}, journal = {J. Polym. Sci.}, pages = {1073--1080}, volume = {17}, year = {1979}, biburl = {http://www.bibsonomy.org/bibtex/261d6407e0052e025c007921392599836/kaigrass}, keywords = {imported } }