Controlled mechanical buckling for origami-inspired construction of 3D microstructures in advanced materials.
Controlled mechanical buckling for origami-inspired construction of 3D microstructures in advanced materials.
复制标题
用于受折纸启发的先进材料 3D 微结构构造的受控机械屈曲
DOI：
10.1002/adfm.201504901
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发表时间：
2016-04-25
影响因子：
19
通讯作者：
Rogers JA
中科院分区：
文献类型：
--
作者：
Yan Z;Zhang F;Wang J;Liu F;Guo X;Nan K;Lin Q;Gao M;Xiao D;Shi Y;Qiu Y;Luan H;Kim JH;Wang Y;Luo H;Han M;Huang Y;Zhang Y;Rogers JA
折纸由于在广泛的应用领域具有广阔的应用前景，在科学界和工程界都迅速引起了越来越多的兴趣。以前在微米/纳米尺度上的折纸结构的组装方法受到适用的材料类别、拓扑结构和/或对转换的控制能力的限制。在这里，我们介绍了一种方法，利用受控的机械屈曲来自动组装3D结构，从软聚合物到脆性无机半导体，长度从纳米到厘米。这种方法依赖于初始2D结构中厚度的空间变化，作为在压缩屈曲过程中产生工程化折叠折痕的有效策略。组装方案的弹性性质使得能够以连续和可逆的方式对2D到3D转换中的中间状态进行主动的、确定性的控制。演示包括通过单向、双向甚至分层折叠形成的一组广泛的3D结构，示例范围从半圆柱形柱子和鱼鳞，到立方盒、金字塔、海星、纸扇、斜齿结构，以及有趣的系统级足球、模型房屋、汽车和多层纹理建筑的示例。提出了一种可控屈曲的方法，用于在不同长度尺度和材料类型的范围内对3D结构进行自主折纸组装，以提供对具有广泛拓扑结构的3D微结构的即时访问。这种组件允许对配置进行连续和可逆的控制。由此产生的工程选项对构建未来一代的微系统技术具有重要影响。
Origami is a topic of rapidly growing interest in both the scientific and engineering research communities due to its promising potential in a broad range of applications. Previous assembly approaches of origami structures at the micro/nanoscale are constrained by the applicable classes of materials, topologies and/or capability of control over the transformation. Here, we introduce an approach that exploits controlled mechanical buckling for autonomic origami assembly of 3D structures across material classes from soft polymers to brittle inorganic semiconductors, and length scales from nanometers to centimeters. This approach relies on a spatial variation of thickness in the initial 2D structures as an effective strategy to produce engineered folding creases during the compressive buckling process. The elastic nature of the assembly scheme enables active, deterministic control over intermediate states in the 2D to 3D transformation in a continuous and reversible manner. Demonstrations include a broad set of 3D structures formed through unidirectional, bidirectional, and even hierarchical folding, with examples ranging from half cylindrical columns and fish scales, to cubic boxes, pyramids, starfish, paper fans, skew tooth structures, and to amusing system-level examples of soccer balls, model houses, cars, and multi-floor textured buildings. Controlled buckling approach for autonomic origami assembly of 3D structures across a wide range of length scales and material types is presented to provide immediate access to 3D microarchitectures with a broad range of topologies. Such assembly allows continuous and reversible control of the configurations. The resulting engineering options have important implications for building future generations of microsystem technologies.