Frustrated phases under three-dimensional confinement simulated by a set of coupled Cahn-Hilliard equations
Frustrated phases under three-dimensional confinement simulated by a set of coupled Cahn-Hilliard equations
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DOI：
10.1039/c6sm00429f
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发表时间：
2016-01-01
期刊：
影响因子：
3.4
通讯作者：
Nishiura, Yasumasa
中科院分区：
文献类型：
--
作者：
Avalos, Edgar;Higuchi, Takeshi;Nishiura, Yasumasa
我们数值研究了一组耦合的Cahn-Hilliard方程，作为一种方法来发现三维球面约束下二嵌段共聚物的形态。这种方法使我们能够找到各种各样的能量最小化工具，包括戒指、网球、Janus球和multipods等。给出了受限形貌的相图。我们修改了微相之间的界面尺寸，以控制多pod形态中孔的数量。对聚苯乙烯-聚异戊二烯二嵌段共聚物的多聚体进行了透射电子显微断层扫描实验观察。
We numerically study a set of coupled Cahn-Hilliard equations as a means to find morphologies of diblock copolymers in three-dimensional spherical confinement. This approach allows us to find a variety of energy minimizers including rings, tennis balls, Janus balls and multipods among several others. Phase diagrams of confined morphologies are presented. We modify the size of the interface between microphases to control the number of holes in multipod morphologies. Comparison to experimental observation by transmission electron microtomography of multipods in polystyrene-polyisoprene diblock copolymers is also presented.