By A. Ben-Shaul, L. Szleifer, W. M. Gelbart (auth.), Dr. Jacques Meunier, Dr. Dominique Langevin, Professor Nino Boccara (eds.)
Amphiphilic layers play crucial roles within the behaviour of a good number of disperse platforms equivalent to micelles, microemulsions and vesicles. they could additionally exist as remoted mono- or bilayers, or represent prolonged liquid crystalline constructions. even supposing the homes of those varied platforms may perhaps before everything sight appear unrelated, theoretical interpretations of them depend upon numerous universal innovations. This used to be the cause of bringing jointly scientists operating during this zone for the foreign iciness tuition at the Physics of Amphiphilic Layers, which used to be held at Les Houches, 10-18 February, 1987. the subjects taken care of within the court cases quantity are mono- and bilayers, interactive forces among layers (with unique emphasis on steric forces), ordered buildings (in specific swollen lamellar stages and defects), vesicles, micelles (including polymer-like systems), microemulsions (especially random bicontinuous buildings) and porous media. the significance of thermal fluctuations within the amphiphilic layers is under pressure. contemporary effects are provided and literature references enable readers now not accustomed to the topic to discover any history details they require.
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Extra resources for Physics of Amphiphilic Layers: Proceedings of the Workshop, Les Houches, France February 10–19, 1987
Tension In normal to the contour and surface shear resultant Is tangent to the contour), a force normal to the surface (transverse shear Qs), and moment resultants (membrane "couples" M). The external pressure normal to the membrane is balanced primarily by tension components multiplied by appropriate curvatures. g. fluid shear stresses) are opposed primarily by the surface gradients of tension. Membrane bending moments and transverse shear provide higher order contributions to these force balances.
B. M. Knobler, D. Broseta, F. Rondelez : J. Chem. Soc. Faraday Trans. 2, 82, 1753 (1986) 9. F. F. A. M. Knobler : Proceedings of the 2nd International Conference on Physico-Chemical Hydrodynamics, Hue Iva , Spain, July I-IS, 1986 (Plenum Press, New York 1987) 10. A. Suresh, J. Nittmann, F. Rondelez : to be published (1987) II. D. Gunton, M. S. Sahni : in Phase Transitions and Critical Phenomena, vol. 8, C. Domb and J. Lebowitz eds. (Academic Press, London 1983) 12. M. K. M. Weis : Froc. Natl. Acad.
Thus, shear rigidity is peculiar to frozen (crystalline) bilayers. The frozen bilayer is a mosaic of microcrystalline domains; therefore, deformation of a frozen vesicle exhibits only a limited elastic response followed by yield and surface flow (presumably due to "melting" and "freezing" of crys1;ial along defect lines in the bilayer surface). The surface rigidity Is is only measurable at the yield threshold for the frozen bilayer since flow commences at very small shear strains. The third elastic relation represents the curvature elasticity of the bilayer.