Abstract
Cholesteric droplets dispersed in polymer with conical boundary conditions have been studied. The director configurations are identified by the polarising microscopy technique. The axisymmetric twisted axial-bipolar configuration with the surface circular defect at the droplet’s equator is formed at the relative chirality parameter . The intermediate director configuration with the deformed circular defect is realised at , and the layer-like structure with the twisted surface defect loop is observed at . The cholesteric layers in the layer-like structure are slightly distorted although the cholesteric helix is untwisted.
Highlights
The droplet dispersions of liquid crystals (LCs) in a solid or liquid matrix attract more interest of researchers [1,2,3,4,5,6,7,8,9]
Cholesteric liquid crystals (CLCs) in a free state are characterised by a helical structure of the director field with an intrinsic helix pitch p0
At the conical boundary conditions the axial-bipolar configuration is the most frequently realised within the droplets of LN-396 nematic [12]
Summary
The droplet dispersions of liquid crystals (LCs) in a solid or liquid matrix attract more interest of researchers [1,2,3,4,5,6,7,8,9]. The orientational structure and, the optical properties of such liquid crystal materials can be changed by modifying the boundary conditions [13,14,15,16,17], varying LC parameters or applying an electric field [1]. It makes it possible to use them in the electrically controlled shutters [18,19], sensors [20,21], lasers [22,23], polarizers [24,25], etc.
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