Towards photo-induced swimming: actuation of liquid crystalline elastomer in water

SPIE LASE Pub Date : 2016-04-06 DOI:10.1117/12.2219855
G. Cerretti, D. Martella, H. Zeng, C. Parmeggiani, S. Palagi, A. Mark, K. Melde, T. Qiu, P. Fischer, D. Wiersma
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引用次数: 1

Abstract

Liquid Crystalline Elastomers (LCEs) are very promising smart materials that can be made sensitive to different external stimuli, such as heat, pH, humidity and light, by changing their chemical composition. In this paper we report the implementation of a nematically aligned LCE actuator able to undergo large light-induced deformations. We prove that this property is still present even when the actuator is submerged in fresh water. Thanks to the presence of azo-dye moieties, capable of going through a reversible trans-cis photo-isomerization, and by applying light with two different wavelengths we managed to control the bending of such actuator in the liquid environment. The reported results represent the first step towards swimming microdevices powered by light.
光诱导游泳:液晶弹性体在水中的驱动
液晶弹性体(LCEs)是一种非常有前途的智能材料,通过改变其化学成分,可以使其对不同的外部刺激(如热、pH值、湿度和光)敏感。在本文中,我们报告了一个向列排列的LCE致动器的实现,该致动器能够经受大的光致变形。我们证明,即使执行器被淹没在淡水中,这种特性仍然存在。由于偶氮染料部分的存在,能够进行可逆的反式顺式光异构化,并且通过施加两种不同波长的光,我们成功地控制了这种致动器在液体环境中的弯曲。报道的结果代表了用光驱动的微型游泳设备的第一步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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