Microfluidic flow of cholesteric liquid crystals.

Microfluidic flow of cholesteric liquid crystals.
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胆甾型液晶的微流体流动。

DOI:
10.1039/c6sm01290f
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发表时间:
2016
期刊:
影响因子:
3.4
通讯作者:
Wiese O
Wiese O
中科院分区:
化学2区
文献类型:
--
作者:
Wiese O

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我们探讨的流变学和流动引起的形态变化的液晶图案受到Poietille流内的平板几何形状,并在不同的锚定条件下的墙壁。我们的重点是特别是对行为的“胆固醇手指的第一种”和蓝色阶段II。根据所施加的压力梯度,我们观察到一些动态的制度,具有不同的流变特性。我们的研究结果提供了第一个洞察到的流动响应完全二维或三维导演场图案和正常和平面退化锚定条件下,通常在实验中实现的双相。它们也是高度相关的复杂的液晶在限制和未来的微流体应用的基础上的微流体应用的重要一步的基本理解。
We explore the rheology and flow-induced morphological changes of cholesteric liquid crystal patterns subject to Poiseuille flow within a slab geometry, and under different anchoring conditions at the wall. Our focus is particularly on the behaviour of “Cholesteric Fingers of the first kind” and of Blue Phase II. Depending on the applied pressure gradient, we observe a number of dynamic regimes with different rheological properties. Our results provide the first insight into the flow response of cholesteric phases with fully two- or three-dimensional director field patterns and normal and planar degenerate anchoring conditions as commonly realised in experiments. They are also of high relevance for a fundamental understanding of complex liquid crystals in confinement and an important step towards future microfluidic applications that are based on cholesteric liquid crystals.
DOI: 10.1002/cphc.200500506
发表时间: 2006-01
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影响因子: --
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