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Updated: Aug 18, 2026

Synthesis of Compound Giant Unilamellar Vesicles: A Biomimetic Model of Nucleate Cells
Published on: July 3, 2025
Coupling field theory with continuum mechanics: a simulation of domain formation in giant unilamellar vesicles
Gary S Ayton1, J Liam McWhirter, Patrick McMurtry
1Center for Biophysical Modeling and Simulation and Department of Chemistry, University of Utah, Salt Lake City, USA.
Abstract:
Domain formation is modeled on the surface of giant unilamellar vesicles using a Landau field theory model for phase coexistence coupled to elastic deformation mechanics (e.g., membrane curvature). Smooth particle applied mechanics, a form of smoothed particle continuum mechanics, is used to solve either the time-dependent Landau-Ginzburg or Cahn-Hilliard free-energy models for the composition dynamics. At the same time, the underlying elastic membrane is modeled using smooth particle applied mechanics, resulting in a unified computational scheme capable of treating the response of the composition fields to arbitrary deformations of the vesicle and vice versa. The results indicate that curvature coupling, along with the field theory model for composition free energy, gives domain formations that are correlated with surface defects on the vesicle. In the case that external deformations are included, the domain structures are seen to respond to such deformations. The present simulation capability provides a significant step forward toward the simulation of realistic cellular membrane processes.
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