Modulation of smectic liquid crystals superstructures under multiple external fields

Making full use of the self -assembly and stimulus -response properties of liquid crystals (LCs) to achieve flexible construction, dynamic manipulation and multi -functional applications of smectic LC hierachical superstructures has great significance for stimulating more cutting -edge innovative devices and pushing the practical application of LC superstructures. This research focuses on preparation and selfassembly of smectic LC superstructures, modulation of defect structures by multiple external stimuli, and dynamic regulation laws. First, the shape and size modulation of smectic LC topological superstructures by photopatterning and spin -coating parameters were explored. Then, the microlensing function of the focal conic domain arrays was verified. Through optimization of composite material and proposing the polymer stabilized strategy, dynamic regulation of the square focal cone domain array under electric field at 35 celcius (i. e. , nematic phase) was demonstrated. Finally, this paper also studied multi -dimensional control of smectic LC topological superstructures by introducing chirality, light field and thermal field. This study combines multiple external field stimuli, such as photoalignment, film thickness, polymer network, electric field, chirality, and light field to achieve multi -dimensional control of the hierachical superstructure of smectic LCs.