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Title: Generation of dynamic structures in nonequilibrium reactive membranes
Author: Reigada Sanz, Ramon
Buceta Fernández, Javier
Lindenberg, Katja
Keywords: Biofísica
Física mèdica
Aparells i instruments científics
Química física
Medical physics
Scientific apparatus and instruments
Physical chemistry
Issue Date: 2005
Publisher: The American Physical Society
Abstract: We present a nonequlibrium approach for the study of a flexible bilayer whose two components induce distinct curvatures. In turn, the two components are interconverted by an externally promoted reaction. Phase separation of the two species in the surface results in the growth of domains characterized by different local composition and curvature modulations. This domain growth is limited by the effective mixing due to the interconversion reaction, leading to a finite characteristic domain size. In addition to these effects, first introduced in our earlier work [ Phys. Rev. E 71 051906 (2005)], the important new feature is the assumption that the reactive process actively affects the local curvature of the bilayer. Specifically, we suggest that a force energetically activated by external sources causes a modification of the shape of the membrane at the reaction site. Our results show the appearance of a rich and robust dynamical phenomenology that includes the generation of traveling and/or oscillatory patterns. Linear stability analysis, amplitude equations, and numerical simulations of the model kinetic equations confirm the occurrence of these spatiotemporal behaviors in nonequilibrium reactive bilayers.
Note: Reproducció del document publicat a:
It is part of: Physical Review E, 2005, vol. 72, núm.5, p. 051921-1-051921-11
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ISSN: 1063-651X
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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