Colloidal particles at the interface between an isotropic liquid and a chiral liquid crystal
Colloidal particles at the interface between an isotropic liquid and a chiral liquid crystal
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各向同性液体和手性液晶界面处的胶体颗粒
作者：
Pawsey A
我们在胆甾液晶（CLC）和各向同性液体（硅油）之间创建了一个界面，在该界面上，各向同性锚定导致胆甾层排列良好，并形成指纹纹理。具有平面锚定的荧光胶体颗粒分散在CLC中，随后使用共聚焦显微镜成像。这些颗粒中的大多数修饰了CLC和硅油之间的界面。我们对颗粒沿垂直于界面方向的位置进行了详细的研究：垂直于界面的颗粒的最终分布明显依赖于颗粒尺寸与中轴间距之间的比例。这表明，通过模拟支持，由于留在CLC中的弹性能量成本，存在颗粒大小和节距长度相关的驱动来驱逐颗粒。我们用偏光显微镜观察了粒子扰动界面时指纹纹理的变化。这与粒子平面内有序的定性研究相结合。颗粒链垂直于螺旋轴形成（平行于胆甾层），而在螺旋轴方向不均匀的地方可以看到无序的聚集体。
We create an interface between a cholesteric liquid crystal (CLC) and an isotropic liquid (silicone oil) at which homeotropic anchoring leads to a well aligned cholesteric layer and the formation of the fingerprint texture. Fluorescent colloidal particles with planar surface anchoring are dispersed in the CLC and subsequently imaged using confocal microscopy. A majority of these particles decorate the interface between the CLC and the silicone oil. We present a detailed study of the position of the particles along the direction perpendicular to the interface: the final distribution of particles perpendicular to the interface has a clear dependence on the ratio between the particle size and the pitch of the CLC. This suggests, supported by simulations, that there is a particle size and pitch length dependent drive to expel particles, due to the elastic energy cost of remaining in the CLC. We use polarizing optical microscopy to observe changes to the fingerprint texture as the particles perturb the interface. This is combined with a qualitative study of the in-plane ordering of the particles. Chains of particles form perpendicular to the helical axis (parallel to the cholesteric layers), whereas disordered aggregates are seen where the direction of the helical axis is not uniform.
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通过荧光共焦偏振显微镜研究胆甾型液晶 Grandjean-Cano 楔形缺陷的三维导向结构。
DOI：
10.1103/physreve.66.051703
发表时间：
2002
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
I. Smalyukh;O. Lavrentovich
通讯作者：
O. Lavrentovich
DOI：
10.1021/la048737f
发表时间：
2004-09
期刊：
Langmuir : the ACS journal of surfaces and colloids
影响因子：
--
作者：
J. Loudet;P. Barois;P. Auroy;P. Keller;H. Richard;P. Poulin
通讯作者：
J. Loudet;P. Barois;P. Auroy;P. Keller;H. Richard;P. Poulin
影响因子：
0.6
作者：
M. Tasinkevych;D. Andrienko
通讯作者：
D. Andrienko
圆柱形纳米粒子和基底之间的液晶介导力。
DOI：
10.1103/physreve.76.041706
发表时间：
2007
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
D. Cheung;M. P. Allen
通讯作者：
M. P. Allen
两种胶体晶体在向列相-液晶-空气界面处共存。
影响因子：
8.6
作者：
A. Nych;V. Pergamenshchik;U. Ognysta;B. Lev;V. Nazarenko;M. Škarabot;I. Muševič;O. Lavrentovich
通讯作者：
O. Lavrentovich