Nanolattices exhibit attractive mechanical, energy conversion and optical properties, but it is challenging to fabricate large nanolattices while maintaining the dense regular nanometre features that enable their properties. Here we report a crack-free self-assembly approach for fabricating centimetre-scale nickel nanolattices with much larger crack-free areas than prior self-assembled nanolattices and many more unit cells than three-dimensionally printed nanolattices. These nickel nanolattices have a feature size of 100 nm, a grain size of 30 nm and a tensile strength of 260 MPa, which approaches the theoretical strength limit for porous nickel. The self-assembly method and porous metal mechanics reported in this work may advance the fabrication and applications of high-strength multifunctional porous materials.

纳米晶格具有吸引人的机械、能量转换和光学特性，但制造大型纳米晶格同时保持致密的规则纳米特征以实现其特性具有挑战性。在这里，我们报告了一种无裂纹自组装方法，用于制造厘米级镍纳米晶格，其无裂纹区域比以前的自组装纳米晶格大得多，晶胞比三维印刷纳米晶格多得多。这些镍纳米晶格的特征尺寸为 100 nm，晶粒尺寸为 30 nm，抗拉强度为 260 MPa，接近多孔镍的理论强度极限。这项工作中报道的自组装方法和多孔金属力学可能会促进高强度多功能多孔材料的制造和应用。