Akram Sk Ashif, Behera Arabinda, Sharma Prerna, Sain Anirban
Department Of Physics, Indian Institute Of Technology Bombay, Powai-400076, Mumbai, India.
Soft Matter. 2020 Dec 7;16(45):10310-10319. doi: 10.1039/d0sm01276a. Epub 2020 Oct 14.
Colloidal membranes, self assembled monolayers of aligned rod like molecules, offer a template for designing membranes with definite shapes and curvature, and possibly new functionalities in the future. Often the constituent rods, due to their molecular chirality, are tilted with respect to the membrane normal. Spatial patterns of this tilt on curved membranes result from a competition among depletion forces, nematic interactions, molecular chirality and boundary effects. We present a covariant theory for the tilt pattern on minimal surfaces, like helicoids and catenoids, which have been generated in the laboratory only recently. We predict several non-uniform tilt patterns, some of which are consistent with experimental observations and some, which are yet to be discovered.
胶体膜，即由排列整齐的棒状分子自组装形成的单分子层，为设计具有确定形状和曲率的膜提供了模板，并且未来可能具有新的功能。通常，组成棒状分子由于其分子手性，会相对于膜法线倾斜。这种倾斜在弯曲膜上的空间模式是由耗尽力、向列相互作用、分子手性和边界效应之间的竞争导致的。我们提出了一种关于最小表面（如螺旋面和悬链面，它们直到最近才在实验室中生成）上倾斜模式的协变理论。我们预测了几种非均匀倾斜模式，其中一些与实验观察结果一致，还有一些有待发现。
