Latypova L, Góźdź W, Pieranski P
Laboratoire de Physique des Solides, Université Paris-Sud, Bât. 510, 91405 Orsay Cedex, France.
Eur Phys J E Soft Matter. 2013 Aug;36(8):88. doi: 10.1140/epje/i2013-13088-9. Epub 2013 Aug 14.
Phase diagrams of phytantriol/ethanol/water and phytantriol/DSPG/ethanol/water systems are explored and experiments on facetings of Pn3m-in-L1 and Im3m-in-L1 crystals are performed. Observed crystal habits do not agree with the Friedel-Donnay-Harker rules. We argue that this paradox can be explained in terms of constraints imposed on Pn3m/L1 and Im3m/L1 interfaces by the bicontinuous topology of the cubic phases. We point out that when free edges of the surfactant bilayer are prohibited at these interfaces, the two labyrinthes separated by the bilayer cannot anymore be equivalent. The corresponding [Formula: see text] and [Formula: see text] symmetry breakings are unveiled by the abnormal facetings.
研究了植烷三醇/乙醇/水和植烷三醇/二硬脂酰磷脂酰甘油/乙醇/水体系的相图，并进行了Pn3m-in-L1和Im3m-in-L1晶体刻面实验。观察到的晶体习性与弗里德尔-多纳伊-哈克规则不一致。我们认为，这种矛盾可以用立方相的双连续拓扑结构对Pn3m/L1和Im3m/L1界面施加的限制来解释。我们指出，当这些界面处的表面活性剂双层的自由边缘被禁止时，由双层分隔的两个迷宫不再等效。相应的[公式：见正文]和[公式：见正文]对称性破缺通过异常刻面得以揭示。
