Capillary induced self-assembly of thin foils into 3D structures
Capillary induced self-assembly of thin foils into 3D structures
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DOI：
10.1016/j.jmps.2010.09.011
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发表时间：
2010-12-01
影响因子：
5.3
通讯作者：
Hsia, K. Jimmy
中科院分区：
文献类型：
--
作者：
Li, Huan;Guo, Xiaoying;Hsia, K. Jimmy
复杂结构的自组装在自然界中很常见。自组装原理为制造三维、微米级或毫米级器件提供了一种有前景的方法。在本文中，我们提出了通过流固相互作用将薄板自折叠成确定性 3D 形状的广义分析研究。基于梁理论，我们开发了一个力学模型，其中结合了两个相互竞争的成分——促进折叠的毛细力和抵抗折叠成 3D 结构的箔片的弯曲刚度。通过不同几何形状的薄箔的等效论证，确定了唯一表征折叠驱动力的有效折叠参数。由此建立了基于有效折叠参数的任何形状的二维图案箔的自发折叠的标准。模型预测与对各种材料进行的实验测量结果非常吻合，表明分析中使用的假设是有效的。 (C) 2010 Elsevier Ltd. 保留所有权利。
Self-assembly of complex structures is common in nature. Self-assembly principles provide a promising way to fabricate three-dimensional, micro- or millimeter scale devices. In the present paper, we present a generalized analytical study of the self-folding of thin plates into deterministic 3D shapes through fluid-solid interactions. Based on the beam theory, a mechanics model is developed, incorporating the two competing components-a capillary force promoting folding and the beinding rigidity of the foil that resists folding into a 3D structure. Through an equivalence argument of thin foils of different geometry, an effective folding parameter, which uniquely characterizes the driving force for folding, has been identified. A criterion for spontaneous folding of any shaped 2D patterned foil based on the effective folding parameter is thus established. The model predictions show excellent agreement with experimental measurements made on a variety of materials, indicating that the assumptions used in the analysis are valid. (C) 2010 Elsevier Ltd. All rights reserved.