Sknepnek Rastko, Olvera de la Cruz Monica
Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 May;85(5 Pt 1):050501. doi: 10.1103/PhysRevE.85.050501. Epub 2012 May 22.
We use an elastic model to explore faceting of solid-wall vesicles with elastic heterogeneities. We show that faceting occurs in regions where the vesicle wall is softer, such as areas of reduced wall thicknesses or concentrated in crystalline defects. The elastic heterogeneities are modeled as a second component with reduced elastic parameters. Using simulated annealing Monte Carlo simulations we obtain the vesicle shape by optimizing the distributions of facets and boundaries. Our model allows us to reduce the effects of the residual stress generated by crystalline defects, and reveals a robust faceting mechanism into polyhedra other than the icosahedron.
我们使用弹性模型来探索具有弹性不均匀性的固体壁囊泡的刻面现象。我们表明，刻面出现在囊泡壁较软的区域，例如壁厚减小的区域或集中在晶体缺陷处。弹性不均匀性被建模为具有降低弹性参数的第二组分。通过模拟退火蒙特卡罗模拟，我们通过优化刻面和边界的分布来获得囊泡形状。我们的模型使我们能够减少由晶体缺陷产生的残余应力的影响，并揭示了一种除二十面体之外的向多面体的稳健刻面机制。
