Stability of inverse bicontinuous cubic phases in lipid-water mixtures

We investigate the stability of seven inverse bicontinuous cubic phases ($G$, $D$, $P$, $C(P)$, $S$, $I-WP$, $F-RD$) in lipid-water mixtures based on a curvature model of membranes. Lipid monolayers are described by parallel surfaces to triply periodic minimal surfaces. The phase behavior is determi...

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Bibliographic Details
Main Authors: Schwarz, Ulrich S. (Author) , Gompper, Gerhard (Author)
Format: Article (Journal) Chapter/Article
Language:English
Published: 2 Sep 2000
In: Arxiv

Online Access:Verlag, kostenfrei, Volltext: http://arxiv.org/abs/cond-mat/0009025
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Author Notes:U.S. Schwarz and G. Gompper
Description
Summary:We investigate the stability of seven inverse bicontinuous cubic phases ($G$, $D$, $P$, $C(P)$, $S$, $I-WP$, $F-RD$) in lipid-water mixtures based on a curvature model of membranes. Lipid monolayers are described by parallel surfaces to triply periodic minimal surfaces. The phase behavior is determined by the distribution of the Gaussian curvature on the minimal surface and the porosity of each structure. Only $G$, $D$ and $P$ are found to be stable, and to coexist along a triple line. The calculated phase diagram agrees very well with experimental results for 2:1 lauric acid/DLPC.
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