Ordered and curved meso-structures in membranes and amphiphilic films
نویسندگان
چکیده
Curvature-induced instabilities in membranes and amphiphilic films are investigated by introducing a general coupling between a shape variable (such as curvature) and «internal» degrees of freedom (such as area per molecule, tilt angle, or local composition). A mean-field treatment of the GinzburgLandau free energy expansion shows the existence of various undulated phases (on a mesoscopic scale) that can appear between condensed (solid-like) and dilute (fluid-like) homogeneous phases of the membrane. These undulated phases are characterized by undulations in their local composition as well as in their local curvature. We find two types of undulated phases stripe and hexagonal 2014 and calculate the phase diagram for the system. J. Physique 48 (1987) 2013-2018 , NOVEMBRE 1987,
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