This study investigates the influence of Grandjean–Cano disclinations on the cholesteric-blue phase I (Ch-BPI) phase transition, revealing the pivotal role of defects in the phase transition of liquid crystals (LCs). We prepared the disclinations by wedge cells or parallel cells with an alignment pattern and demonstrated that the disclinations induce a phase transition in Ch-BPI. Furthermore, we demonstrated the control of the BPI appearance areas by utilizing this property. This defect-induced transition technique not only provides a novel method for controlling BPI orientation, but also offers insights into soft material crystal growth, suggesting potential applications in new BPLC-based device development.

中文翻译：

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模式控制 Grandjean-Cano 向错诱导胆甾蓝 I 相的选择性相变

本研究研究了 Grandjean-Cano 向错对胆甾蓝 I 相 (Ch-BPI) 相变的影响，揭示了缺陷在液晶 (LC) 相变中的关键作用。我们通过具有对齐模式的楔形细胞或平行细胞制备向错，并证明向错诱导 Ch-BPI 中的相变。此外，我们还演示了利用该属性对 BPI 外观区域的控制。这种缺陷诱导转变技术不仅提供了一种控制 BPI 取向的新方法，而且还提供了对软材料晶体生长的见解，表明在基于 BPLC 的新型设备开发中的潜在应用。