The surface topographies of natural surfaces play significant roles for improving the ability to adapt to the environment. The micropapilla of lotus leaf is always used to enhance its self‐cleaning performance. However, the function of the submillimeter papilla of lotus has not been well studied. In this study, it is found that the optimal distribution of submillimeter papilla can effectively prevent the rupture of lotus leaf. Under loading, the submillimeter papilla transfers the stress into its root region, which effectively keeps the leaf broadly intact and collaborates to realize relative functions with micropapilla. Further study by integrating the simulations and biofabricated membrane with artificial submillimeter papilla indicates the contribution of submillimeter papilla on the mechanical property. This study opens a novel avenue for designing strength membrane materials, which has potential applications in the fields of soft robot, electronic device, and packaging.

中文翻译：

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表面亚毫米乳头增强了膜的力学性能

天然表面的表面形貌对于提高适应环境的能力起着重要作用。荷叶微乳头通常用于增强其自洁性能。然而，莲花的亚毫米乳头的功能尚未得到很好的研究。在这项研究中，发现亚毫米乳头的最佳分布可以有效防止荷叶破裂。在负载下，亚毫米乳头将应力转移到其根部区域，从而有效地使叶片保持完整，并与微乳头协作实现相对功能。通过将模拟和生物人造膜与人造亚毫米乳头整合在一起的进一步研究表明，亚毫米乳头对机械性能的贡献。