扭曲-弯曲向列相是一种手性向列相, 具有纳米级螺距的倾斜螺旋结构。由于其负弯曲弹性常数、纳米级螺距以及非手性分子形成手性结构等性质, 引起了世界各地科研工作者的广泛关注。本文回顾了扭曲-弯曲向列相研究的发展历程, 重点介绍了对扭曲-弯曲向列相的特征、性能、分子运动、分子基团的研究, 阐述了扭曲-弯曲向列相在外场作用下微观结构的变化以及对扭曲-弯曲向列相的理论及模拟研究的发展现状, 并探讨了扭曲-弯曲向列相液晶的应用前景和发展趋势。本文从材料的特性、性能、应用等方面对扭曲-弯曲向列相液晶进行综述, 旨在让广大读者对这种特殊液晶光学材料的相关研究有比较全面的了解, 以此激发读者对扭曲-弯曲向列相液晶材料在相态结构、理论模拟乃至应用领域等方面更多的研究灵感。希望本文能够起到抛砖引玉的作用, 从一定程度上对该领域的研究发展有所促进。

Twist-bend nematic phase is a chiral nematic phase with an inclined spiral structure possessing nanometer helical pitch. Due to its negative bend elastic constant, nano-scale pitch, and chiral structure formed by achiral molecules, it has attracted widespread attention from researchers all over the world. This article reviews the development of twist-bend nematics, focuses on the study of the characteristics, properties, molecular motion, and molecular groups of twist-bend nematics, and illustrates the effects of twist-bend nematics under external fields. The microstructure changes and the development of theoretical and simulation research on twist-bend nematic phase, and the application prospects and development trends of twist-bend nematic liquid crystal are discussed. The aim of this article is to provide readers with a comprehensive understanding of the related research of the special liquid crystal optical materials through the review of the materials characteristics, properties, applications and other aspects of twist-bend nematic liquid crystals, and thus stimulate the readers research inspiration on their phase structure, theoretical simulation, applications, etc. It is hoped that this paper can start a discussion and promote the research and development of this field to some extent.