3D-to-3D Microscale Shape-Morphing from Configurable Helices with Controlled Chirality

微尺度化学 变形 材料科学 微加工 3D打印 平面的 纳米技术 智能材料 纸卷 沟槽(工程) 转化(遗传学) 计算机科学 机械工程 制作 人工智能 复合材料 计算机图形学(图像) 病理 替代医学 冶金 化学 数学教育 工程类 基因 医学 生物化学 数学
作者
Zhenyu Zhao,Yisheng He,Xiao Meng,Chunhong Ye
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:13 (51): 61723-61732 被引量:3
标识
DOI:10.1021/acsami.1c15711
摘要

Tunable and reconfigurable materials with autonomic shape transformation in response to the environment have emerged as one of the most promising approaches for a variety of biomedical applications, such as tissue engineering, biosensing, and in vivo biomedical devices. Currently, it is still quite challenging to fabricate soft, microscaled 3D shape-reconfigurable structures due to either complicated microfabrication or limited microscale photopolymerization-based printing approaches to enable adaptive shape transformation. Here, a one-step photo-cross-linking approach has been demonstrated to obtain a 3D-to-3D morphological transformable microhelix from a self-rolled hydrogel microsheet, resulting in chirality conversion. It was enabled by a custom-designed "hard" stripe/"soft" groove topography on the microsheets for introducing, which introduced both in-planar and out-of-planar anisotropies. Both experiment and simulation confirmed that a stripe/groove geometry can effectively control the 3D transformation by activating in-planar or/and out-of-planar mismatch stress within the microsheets, resulting in switching of the rolling direction between perpendicular/parallel to the length of the stripe. Furthermore, versatile 3D microconstructs with the ability to transform between two distinct 3D configurations have been achieved based on controlled rolling of microhelices, demonstrated as "windmill"-to-"T-cross" and "cylinder"-to-"scroll" transformations and dynamic blossoming of biomimetic orchids. In contrast to conventional 2D-to-3D micro-origami, we have successfully demonstrated an approach for fabricating microscale, all-soft-material-based constructs with autonomic 3D-to-3D structural transformation, which presents an opportunity for designing more complex hydrogel-based microrobotics.
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