期刊
LANGMUIR
卷 27, 期 12, 页码 7446-7452出版社
AMER CHEMICAL SOC
DOI: 10.1021/la200842z
关键词
-
资金
- International Institute for Complex Adaptive Matter (ICAM-I2CAM)
- University of Colorado
- NSF [DMR-0645461, DMR-0820579, DMR-0847782]
- National Basic Research program of China [2004CB719800]
- Direct For Mathematical & Physical Scien [844115] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0847782] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0820579] Funding Source: National Science Foundation
- Division Of Materials Research [844115] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [0755366] Funding Source: National Science Foundation
We report alignment of anisotropic amphiphilic dye molecules within oblate and prolate anisotropic micelles and lamellae, the basic building blocks of surfactant-based lyotropic liquid crystals. Absorption and fluorescence transition dipole moments of these dye molecules orient either parallel or orthogonal to the liquid crystal director. This alignment enables three-dimensional visualization of director structures and defects in different lyotropic mesophases by means of fluorescence confocal polarizing microscopy and two-photon excitation fluorescence polarizing microscopy. The studied structures include nematic tactoids, Schlieren texture with disclinations in the calamitic nematic phase, oily streaks in the lamellar phase, developable domains in the columnar hexagonal phase, and various types of line defects in the discotic cholesteric phase. Orientational three-dimensional imaging of structures in the lyotropic cholesterics reveals large Burgers vector dislocations in cholesteric layering with singular disclinations in the dislocation cores that are not common for their thermotropic counterparts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据