Polymorphism of vesicles with multi-domain patterns
Polymorphism of vesicles with multi-domain patterns
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DOI：
10.1039/b902388g
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发表时间：
2009-01-01
期刊：
影响因子：
3.4
通讯作者：
Lipowsky, Reinhard
中科院分区：
文献类型：
--
作者：
Gutlederer, Erwin;Gruhn, Thomas;Lipowsky, Reinhard
具有两种共存流体相的囊泡膜可以表现出多种域模式。通过最小化取决于膜组成和膜材料参数的能量泛函，从理论上研究了这些图案和相关的囊泡形状。后面的参数是（i）弯曲刚度和（ii）两种类型膜域的高斯曲率模量以及（iii）域边界的线张力。结果表明，这些不同参数之间的相互作用导致稳定的多域模式，对于各种膜成分和材料参数，具有两个以上的域。随着膜组成或材料参数的变化，囊泡可以在不同膜域模式之间进行转变。对于固定的囊泡体积，观察到额外的域诱导转变，其中囊泡形状发生变化，即使域模式没有变化。根据形态图总结了不同的多域模式和囊泡形状。
Vesicle membranes with two coexisting fluid phases can exhibit a variety of domain patterns. These patterns and the associated vesicle shapes are studied theoretically by minimization of energy functionals that depend on the membrane composition and on the material parameters of the membrane. The latter parameters are (i) the bending rigidities and (ii) the Gaussian curvature moduli of the two types of membrane domains as well as (iii) the line tension of the domain boundaries. It is shown that the interplay between these different parameters leads to stable multi-domain patterns with more than two domains for a wide range of membrane composition and material parameters. As the membrane composition or the material parameters are varied, the vesicles can undergo transitions between different patterns of membrane domains. For fixed vesicle volume, an additional domain-induced transition is observed, in which the vesicle shape changes even though the domain pattern does not. The different multi-domain patterns and vesicle shapes are summarized in terms of morphology diagrams.