Abstract The aim of this study is to fabricate a meta-film exhibiting nonlinear elastic behavior on the basis of the significant deformability of spring-shaped nano-helices using glancing angle deposition. The unique mechanical properties of this film were examined by extracting a single nano-helix and examining this element using in situ electron microscopy while applying a tensile load. The helix showed nonlinear reversible behavior and the relationship between load, F [nN], and displacement, δ [nm], was determined to be F = 4.1δ + 0.0041δ2. A nonlinear finite element analysis confirmed that this nonlinearity originated from the large deformation permitted by the spring shape. Both the stiffness and degree of nonlinearity of the meta-film could potentially be adjusted over a wide range by modifying the geometry and the density of the nano-helices.

中文翻译：

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包含纳米螺旋的超薄膜中的非线性弹性

摘要 本研究的目的是基于使用掠射角沉积的弹簧形纳米螺旋的显着变形能力来制造表现出非线性弹性行为的超薄膜。通过提取单个纳米螺旋并在施加拉伸载荷的同时使用原位电子显微镜检查该元素来检查该薄膜的独特机械性能。螺旋线表现出非线性可逆行为，载荷 F [nN] 和位移 δ [nm] 之间的关系被确定为 F = 4.1δ + 0.0041δ2。非线性有限元分析证实，这种非线性源于弹簧形状允许的大变形。