Pilz da Cunha Marina, Peeketi Akhil R, Ramgopal Adithya, Annabattula Ratna K, Schenning Albert P H J
Laboratory of Stimuli-responsive Functional Materials & Devices, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB, Eindhoven, The Netherlands.
Stimuli-Responsive Systems Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras (IITM), 600036, Chennai, India.
ChemistryOpen. 2020 Nov 6;9(11):1149-1152. doi: 10.1002/open.202000237. eCollection 2020 Nov.
Achieving oscillatory motion in polymers without requiring on/off switching of stimuli is a current challenge. Hereby, a free-standing liquid crystal polymer (LCP) is demonstrated to undergo a sustained oscillatory motion when triggered by light, moving back and forth, resembling the motion of a rocking-chair. Two polymer films having different azobenzene photo-switches have been studied, revealing photoswitch requirements as well as illumination conditions necessary to sustain oscillations. The motion presented here shows how feedback loops involving light-triggered actuation, self-shadowing and a shifting center of gravity can be utilized to achieve self-sustained motion in free-standing polymers.
在不要求刺激进行开/关切换的情况下，实现聚合物中的振荡运动是当前面临的一项挑战。在此，一种独立式液晶聚合物（LCP）被证明在受到光触发时会进行持续的振荡运动，前后移动，类似于摇椅的运动。研究了两种具有不同偶氮苯光开关的聚合物薄膜，揭示了维持振荡所需的光开关要求以及光照条件。这里展示的运动表明，涉及光触发驱动、自遮挡和重心转移的反馈回路可如何用于在独立式聚合物中实现自持运动。
