Phototriggered Selective Actuation and Self‐Oscillating in Dual‐Phase Liquid Crystal Photonic Actuators,Advanced Optical Materials

当前位置： X-MOL 学术 › Adv. Opt. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Phototriggered Selective Actuation and Self‐Oscillating in Dual‐Phase Liquid Crystal Photonic Actuators
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-05-22 , DOI: 10.1002/adom.201800131
Wanyuan Wei ₁ , Zhewei Zhang ₁ , Jie Wei ₁ , Xiaofeng Li ₂ , Jinbao Guo ₁

Affiliation

Among different kinds of photoactuators available, those based on liquid‐crystal polymer networks (LCNs) are gathering a great deal of attention due to their fast response and versatility of structural design. However, only a few reports have focused on the phototriggered LCN actuators for complex actuation and multifunction properties. Here, a phototriggered LCN‐based photonic actuator with quasi‐bilayer structure that exhibits fast and reversible shape changes is created by infiltrating a LCN precursor–graphene oxide mixture into a silica opal template, ultraviolet photopolymerization, and removing the template. Particularly, the phototriggered selective actuation behavior is achieved in dual‐phase LCN‐based photonic actuators with macroscopically alternating nematic (N) and isotropic (I) phase, which enables versatile actuation modes and allows multiple shape changes. In addition, a two‐segmented, dual‐phase LCN‐based photonic actuator exhibits self‐oscillating motion when a responsive N‐phase region as localized active point is irradiated, which arises from the self‐shadowing of the passive I‐phase region. To demonstrate the potential application of this self‐oscillating motion behavior, a photoelectric energy conversion device that is capable of converting light energy to electric energy is constructed.

中文翻译：

双相液晶光子致动器中的光触发选择性激励和自激振荡

在各种可用的光致动器中，基于液晶聚合物网络（LCN）的光致动器因其快速响应和结构设计的多功能性而受到了广泛的关注。然而，只有很少的报道集中在光触发的LCN致动器上，以实现复杂的致动和多功能特性。在这里，通过将LCN前体-氧化石墨烯混合物渗透到二氧化硅蛋白石模板中，进行紫外线光聚合，然后除去模板，创建了具有准双层结构且具有快速且可逆的形状变化的基于LCN的光触发致动器。特别是，在具有宏观交替向列（N）和各向同性（I）相的基于LCN的双相光子致动器中，实现了光触发的选择性致动行为，启用多种驱动模式并允许多种形状变化。此外，当响应的N相区域作为局部活动点被照射时，两段式，基于LCN的双相双光子致动器会表现出自振荡运动，这是由于无源I相区域的自遮蔽引起的。为了演示这种自激振动行为的潜在应用，构建了一种能够将光能转换为电能的光电能量转换装置。

更新日期：2018-05-22

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南