ABSTRACT Flexible low-power reflective photonics and display devices with high stability to environmental stimuli such as temperature and mechanical stress have attracted significant attention. Although a lot of efforts have been dedicated in developing blue phase liquid crystals films with high stability and low sensitivity to circumstance, challenges still remain due to the existence of liquid crystals that are sensitive to temperature or mechanical stress. Herein, we demonstrate a flexible blue phase liquid crystal film with high stability through one-step fabrication based on polymerisable liquid crystal. Broad temperature range from −50°C~260°C has been achieved, and the mechanical stress effect has been investigated. The fabricated film is solid without liquid crystal material. This flexible blue phase liquid crystal film with a broad working temperature range, good mechanical stress insensitivity, easy and simple fabrication procedure shows application potential in flexible reflective display, lasers and sensors, where the premier requirement is stability instead of tenability. Graphical abstract (a) Schematic of blue phase liquid crystal film in BPI with body-centred cubic structure; (b) Double twist cylinder consisted by liquid crystal molecular in BPI.

中文翻译：

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基于聚合液晶的高稳定性柔性蓝相液晶薄膜

摘要 对温度和机械应力等环境刺激具有高稳定性的柔性低功率反射光子学和显示器件引起了广泛关注。尽管在开发稳定性高、环境敏感度低的蓝相液晶薄膜方面付出了很多努力，但由于液晶对温度或机械应力敏感的存在，挑战仍然存在。在此，我们通过基于可聚合液晶的一步制造展示了一种具有高稳定性的柔性蓝相液晶薄膜。实现了-50°C~260°C的宽温度范围，并研究了机械应力效应。制作的薄膜为固体，不含液晶材料。这种柔性蓝相液晶薄膜具有广泛的工作温度范围、良好的机械应力不敏感性、简单的制造工艺，在柔性反射显示器、激光器和传感器中显示出应用潜力，这些领域的首要要求是稳定性而不是持久性。图形摘要 (a) BPI 中具有体心立方结构的蓝相液晶薄膜示意图；(b) BPI 中由液晶分子构成的双捻柱体。