Domain morphology in a two‐dimensional anisotropic mesophase: Cusps and boojum textures in a Langmuir monolayer
Domain morphology in a two‐dimensional anisotropic mesophase: Cusps and boojum textures in a Langmuir monolayer
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二维各向异性中间相中的域形态：朗缪尔单层中的尖点和 boojum 纹理
DOI：
10.1063/1.468196
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发表时间：
1994
影响因子：
4.4
通讯作者：
C. Knobler
中科院分区：
文献类型：
--
作者：
D. K. Schwartz;M. Tsao;C. Knobler
利用Brewster角显微镜（BAM）和偏振荧光显微镜（PFM）观察了五酸Langmuir单层中倾斜凝聚相与各向同性液相共存的结构域。分子倾斜方向在畴内的取向可以被描述为一个“虚拟boojum”纹理，并且在boojum顶点的畴边界上出现一个尖端。对于直径大于25 μm的畴，尖端的夹角随畴尺寸的增大而增大。所有这些观察结果至少在质量上与最近对可变形材料的广义Wulff结构的预测一致[J]。Rudnick和R. Bruinsma，物理学家。启。(提交)]。
Brewster angle microscopy (BAM) and polarized fluorescence microscopy (PFM) were used to observe domains of a tilted condensed phase in coexistence with an isotropic liquid phase in Langmuir monolayers of pentadecanoic acid. The orientation of the molecular tilt direction inside the domains can be described as a ‘‘virtual boojum’’ texture and a cusp appears in the domain boundary at the vertex of the boojum. The angle subtended by the cusp increases with the domain size for domains greater than 25 μm in diameter. All of these observations are at least qualitatively consistent with the recent predictions of a generalized Wulff construction for deformable materials [J. Rudnick and R. Bruinsma, Phys. Rev. Lett. (submitted)].