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Updated: May 13, 2026

Phase Behavior of Charged Vesicles Under Symmetric and Asymmetric Solution Conditions Monitored with Fluorescence Microscopy
Published on: October 24, 2017
Multidomain and ground state configurations of two-phase vesicles
1Department of Mechanical Engineering, McGill University, Montréal, QC, Canada.
This study models lipid domain equilibrium on two-phase vesicles, finding line tension decreases with more domains. Critical osmotic pressure and excess radius are key for ground state configurations.
Area of Science:
- Biophysics
- Materials Science
Background:
- Lipid domains on vesicles are crucial for biological membrane organization.
- Understanding their equilibrium is key to cell function and drug delivery.
Purpose of the Study:
- To model the equilibrium of lipid domains on two-phase vesicles.
- To analyze multidomain and ground state configurations.
- To explore critical parameters influencing vesicle phase separation.
Main Methods:
- A simple theoretical model was developed.
- Two configurations were analyzed: multidomain (fixed volume) and ground state (variable volume).
- Lipid domains were modeled as spherical caps.
Main Results:
- Line tension in multidomain configurations decreases as the number of domains increases.
- Critical osmotic pressure and excess radius are important for ground state configurations.
- Variations of critical quantities with relevant parameters were investigated.
Conclusions:
- The number of lipid domains significantly impacts line tension.
- Osmotic pressure and vesicle geometry play critical roles in phase separation.
- This model provides insights into vesicle behavior and stability.
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