Application on light-driven actuators using photochromic crystals

可逆地改变形状和/或尺寸的光驱动执行器备受关注，因为它们可以允许远程操作而无需直接接触。二芳基乙烯晶体在紫外光照射下发生变形，变形的晶体具有热稳定性，在可见光照射下恢复到原始状态。这些晶体在大约 25 微秒内响应形状变化，并且可以移动微观物体。还研究了二芳基乙烯单晶的光致形状变化与其在晶体中的分子堆积之间的相关性。尽管这三种二芳基乙烯具有不同的电子结构并且在紫外线照射下表现出不同的颜色，但晶体结构和晶体的分子堆积彼此非常相似。结果表明变形模式确定

Light-driven actuators that reversibly change shape and/or size have much attention because they can allow remote operation without the need for direct contact. The diarylethene crystals are deformed upon irradiation with ultraviolet light, and the deformed crystals are thermally stable and return to the original state upon irradiation with visible light. The crystals respond in about 25 microseconds in shape changes and they can move microscopic objects. Correlation between the photoinduced shape changes of diarylethene single crystals and their molecular packing in the crystals was also studied. Although these three diarylethenes have different electronic structures and exhibit different colors upon UV irradiation, the crystallographic structures and molecular paking of the crystals are very similar to each other. The result indicates that the deformation mode is determined