Development of Light-driven Crystal Machinery

利用光刻晶体在光刻照射下表现出光刻弯曲运动，研究了晶体机械的构造。然而，由于耐用性不足，使用单晶的一块作为晶体机是不切实际的。单晶与一些软材料（如聚合物）的复合材料可以增加机械装置的可能性。制备了水杨基苯基乙胺的平板状手性晶体和非手性晶体在磁场作用下排列的有机硅聚合物薄膜。此外，液体树脂悬浮液表面的摩擦也使晶体排列。在紫外和可见光交替照射下，聚合物薄膜表现出可逆的光力学弯曲。综上所述，元素技术是晶体机械制造的发展方向。

Construction of crystal machinery was studied by utilizing photomechanical crystals, which exhibit photomechanical bending motion upon photoirradiation. However, it is impractical to use one piece of a single crystal as a crystal machine due to insufficient durability. A composite of single crystals with some soft materials such as polymers may increase the possibility for mechanical devices. Silicone polymer films in which plate-like chiral and achiral crystals of salicylidenephenylethylamines were aligned by a magnetic field were prepared. Further, rubbing of the surface of liquid resin suspension also gave alignment of crystals. The polymer films exhibited reversible photomechanical bending upon alternate irradiation with UV and visible light. In conclusion, element technology was developed to make crystal machinery.