Experimental Insights into the Nanostructure of the Cores of Topological Defects in Liquid Crystals.
Experimental Insights into the Nanostructure of the Cores of Topological Defects in Liquid Crystals.
复制标题
对液晶拓扑缺陷核心纳米结构的实验见解。
DOI：
--
复制
发表时间：
2016
影响因子：
8.6
通讯作者：
N. Abbott
中科院分区：
文献类型：
--
作者：
Xiaoguang Wang;Young;E. Bukusoglu;Bo Zhang;Daniel S. Miller;N. Abbott
尽管已经报道了许多理论预测，但各向异性凝聚态拓扑缺陷核心的纳米结构是一个尚未解决的问题。在这封信中报道的实验研究中，我们从液晶缺陷核心中组装出两亲性分子，从而提供了第一个实验证据，证明光学上表现为点（强度 m=+1）的奇异缺陷核心是纳米尺寸的闭环向错线。我们还在模型的背景下分析了这一结果，该模型描述了两亲组装体对缺陷自由能和稳定性的影响。总的来说，我们的实验结果和理论预测表明，具有相反强度（例如，m=+1 与 m=-1）的缺陷核心的不同方式会深刻影响分子自组装过程。
The nanoscopic structure of the cores of topological defects in anisotropic condensed matter is an unresolved issue, although a number of theoretical predictions have been reported. In the experimental study reported in this Letter, we template the assembly of amphiphilic molecules from the cores of defects in liquid crystals and thereby provide the first experimental evidence that the cores of singular defects that appear optically to be points (with strength m=+1) are nanometer-sized closed-loop, disclination lines. We also analyze this result in the context of a model that describes the influence of amphiphilic assemblies on the free energy and stability of the defects. Overall, our experimental results and theoretical predictions reveal that the cores of defects with opposite strengths (e.g., m=+1 vs m=-1) differ in ways that profoundly influence processes of molecular self-assembly.