论文标题
光引起的旋转和运动
Light-induced swirling and locomotion
论文作者
论文摘要
光机械液晶弹性体（LCE）是反应性聚合物，可以直接转化为机械变形。这种独特的功能使这些材料成为能够远程和多模式致动的软执行器的有吸引力的候选者。在这项工作中，我们提出了一个光学机械LCE的非线性和非局部动力学的三维多尺度模型。我们使用该模型表明，浸入液体中的预压力螺旋状纤维可以在稳定的照明下进行周期性的旋转运动。我们分析了旋转变形的光驱动时空模式和稳定性，并提供了参数研究。与以前在光驱动的周期性运动方面的工作不同，这种旋转运动并不能以快速现象的形式利用不稳定性，或者像滚动一样重力。然后，我们证明可以在开发遥控生物启发的微武器和新颖的微弹能中利用这种运动。
Photomechanical liquid crystal elastomers (LCEs) are responsive polymers that can convert light directly into mechanical deformation. This unique feature makes these materials an attractive candidate for soft actuators capable of remote and multi-mode actuation. In this work, we propose a three-dimensional multi-scale model of the nonlinear and nonlocal dynamics of fibers of photomechanical LCEs under illumination. We use the model to show that a pre-stressed helix-like fibers immersed in a fluid can undergo a periodic whirling motion under steady illumination. We analyze the photo-driven spatiotemporal pattern and stability of the whirling deformation, and provide a parametric study. Unlike previous work on photo-driven periodic motion, this whirling motion does not exploit instabilities in the form of snap-through phenomena, or gravity as in rolling. We then show that such motion can be exploited in developing remote controlled bio-inspired microswimmers and novel micromixers.
