因具有独特的三维自组装周期性结构、可见光波段的光子带隙和软物质特性，蓝相液晶（BPLC）被认为是最具发展潜力的可调三维光子晶体（PCs）材料之一。目前，宽温域室温BPLC的制备仍有挑战性，且蓝相自组装行为、三维周期性结构的构造与控制及其外场响应性能的研究尚存在诸多空白，亟待深入的研究探索。本项目拟通过设计、合成及共混单体液晶分子，制备具有电或光刺激响应性能的宽温域BPLC材料；通过系统研究基板表面束缚条件、材料组分及比例、热处理过程、外场刺激对BPLC自组装行为和三维结构的影响规律，获得具备优异光学性能的BPLC-PCs；通过掺杂含有特殊基元修饰的纳米粒子探索其对BPLC温域和外场响应性能的影响规律，进一步提升BPLC的外场响应特性。本项目将阐明BPLC材料的功能化设计和制备方法，揭示蓝相自组装行为及作用机制，为开发宽温域、可调谐BPLC-PCs材料和光学器件提供实验基础和理论指导。

Blue phase liquid crystals (BPLC) have been regarded as one kind of the most promising candidates for tunable three-dimensional (3D) photonic crystals (PCs) due to their unique 3D self-assembly periodic structures, photonic bandgaps in visible light range and characteristics of soft matter. At present, the preparation of BPLC materials with wide temperature range covering room temperature is still a challenge. In addition, there are lots of gaps in the research of the self-assemble, the construction and control of 3D periodic structures and stimuli-responsive performances, which need for further intensive explorations. In this project, BPLC materials with wide temperature range as well as electric field or light stimulation responsiveness will be prepared through the design, synthesis and blending of monomer liquid crystal molecules. Meanwhile, the influence of various factors, such as the surface anchoring conditions of the substrates, material composition or proportion, heat treatment process and external stimulation, on the self-assembly behaviors and corresponding 3D nanostructure of BPLC, will be systematically studied to obtain BPLC-PCs with excellent optical properties. Besides, nano particles with special mesogen modification will be doped into the BPLC to study their influence on the temperature range and field responsive performance, thus improving the responsiveness of BPLC. This project will clarify the functional design and preparation methods of BPLC materials and reveal their self-assemble and internal mechanism, which may provide some experimental basises and theoretical guidances for the development of BPLC-PCs materials and optical devices with wide temperature range and high tunability.