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首页> 外文期刊>Chemistry: A European journal >Photocontrolled manipulation of a microscale object: A rotational or translational mechanism
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Photocontrolled manipulation of a microscale object: A rotational or translational mechanism

机译：微尺度物体的光控处理：旋转或平移机制

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摘要

In this paper the photocontrolled manipulation of solid materials on the surface of a liquid crystalline thin film is described. Three different types of films namely cholesteric liquid crystal (ChLC), compensated nematic liquid crystal (NLC) and nematic LC were used. The rotational and translational manipulation of the microscale solid object was induced by irradiation of light and mode of manipulation (either translational or rotational) was changed by changing the isomer of the azobenzene compound used to make the film. Rotational motion of the object was observed on the ChLC and compensated NLC films containing chirally pure azobenzene compound. The direction of rotational motion was controlled either by changing the optical isomer of the chiral azobenzene or by changing the irradiating light (from ultraviolet to visible). When racemic mixture of the chiral azobenzene compound was used, a translational motion of the object was observed. Even though the direction of the translational motion can be controlled by controlling irradiation position, more facile and precise manipulation of the objects was possible by spatially controlled irradiation of Ar~+ laser and diode UV laser.
机译：在本文中，描述了对液晶薄膜表面上的固体材料的光控处理。使用了三种不同类型的薄膜，即胆甾型液晶（ChLC），补偿向列液晶（NLC）和向列LC。微型固体物体的旋转和平移操纵是通过光的照射引起的，并且通过改变用于制造薄膜的偶氮苯化合物的异构体来改变操纵方式（平移或旋转）。在含有手性纯偶氮苯化合物的ChLC和补偿的NLC膜上观察到物体的旋转运动。通过改变手性偶氮苯的旋光异构体或通过改变辐照光（从紫外线到可见光）来控制旋转运动的方向。当使用手性偶氮苯化合物的外消旋混合物时，观察到物体的平移运动。即使可以通过控制照射位置来控制平移运动的方向，但是通过空间控制Ar〜+激光和二极管UV激光的照射，也可以对物体进行更轻松，更精确的操作。

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