Photothermal actuated origamis based on graphene oxide-cellulose programmable bilayers.,Nanoscale Horizons

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Photothermal actuated origamis based on graphene oxide-cellulose programmable bilayers.
Nanoscale Horizons ( IF 8.0 ) Pub Date : 2020-02-05 , DOI: 10.1039/c9nh00719a
Dace Gao ₁ , Meng-Fang Lin ₁ , Jiaqing Xiong ₁ , Shaohui Li ₁ , Shi Nee Lou ₁ , Yizhi Liu ₂ , Jing-Hao Ciou ₁ , Xinran Zhou ₁ , Pooi See Lee ₁

Affiliation

The design and construction of 3D architectures enabled by stimuli-responsive soft materials can yield novel functionalities for next generation soft-bodied actuating devices. Apart from additive manufacturing processes, origami inspired technology offers an alternative approach to fabricate 3D actuators from planar materials. Here we report a class of near-infrared (NIR) responsive 3D active origamis that deploy, actuate and transform between multistable structural equilibria. By exploiting the nonlinear coefficient of thermal expansion (CTE) of graphene oxide (GO), graphene oxide/ethylene cellulose (GO/EC) bilayers are readily fabricated to deliver precise origami structure control, and rapid low-temperature-triggered photothermal actuation. Complexity in 3D shapes is produced through heterogeneously patterning GO domains on 2D EC thin films, which allows us to customize 3D architectures that adapt to various robotic functions. The strategy also enables the construction of material systems possessing naturally inaccessible properties, such as remotely controlled mechanical metamaterials with auxetic behavior and bionic flowers with a rapid blooming rate. Harnessing deformability with multiple degrees of freedom (DOF) upon light irradiation, this work leads to breakthroughs in the design and implementation of shape-morphing functions with soft origamis.

中文翻译：

基于氧化石墨烯纤维素可编程双层的光热致动牛至。

通过刺激响应性软材料实现的3D架构的设计和构建可以为下一代软体致动设备提供新颖的功能。除了增材制造工艺外，折纸启发的技术还提供了一种替代方法，可以用平面材料制造3D执行器。在这里，我们报告了一类近红外（NIR）响应3D主动Origamis，它们在多稳态结构平衡之间进行部署，激活和转换。通过利用氧化石墨烯（GO）的非线性热膨胀系数（CTE），可以容易地制造氧化石墨烯/乙烯纤维素（GO / EC）双层，以提供精确的折纸结构控制和快速的低温触发光热致动。3D形状的复杂性是通过在2D EC薄膜上异质构图GO域而产生的，这使我们能够定制适合各种机器人功能的3D架构。该策略还可以构建具有自然不可访问特性的材料系统，例如具有发胀行为的远程控制机械超材料和具有快速开花速度的仿生花。利用光照射时具有多个自由度（DOF）的可变形性，这项工作导致具有软Origamis的形状变形功能的设计和实现方面的突破。

更新日期：2020-02-05

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