Mechanical nanolattices printed using nanocluster-based photoresists
Mechanical nanolattices printed using nanocluster-based photoresists
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DOI：
10.1126/science.abo6997
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发表时间：
2022-11-18
期刊：
影响因子：
56.9
通讯作者：
Gu, X. Wendy
中科院分区：
文献类型：
--
作者：
Li, Qi;Kulikowski, John;Gu, X. Wendy
天然材料由于其具有优化的层次、各向异性和纳米孔隙度的纳米结构、纳米复合结构而表现出新兴的机械性能。制造这种复杂的系统目前具有挑战性，因为高质量的三维（3D）纳米打印主要局限于简单、均匀的材料。我们报告了一种利用金属纳米团簇快速打印复杂结构纳米复合材料的策略。这些超小的、受量子限制的纳米团簇作为高度敏感的双光子激活剂，同时作为机械增强剂和纳米级孔隙素的前体。打印具有复杂3D结构的纳米复合材料，以及具有可调，分层和各向异性纳米孔隙度的结构。纳米团簇-聚合物纳米晶格具有高比强度、能量吸收、可变形性和可恢复性。该框架为在具有紧急机械性能的复杂系统的增材制造中使用光活性纳米材料提供了一种通用的、通用的方法。
Naturalmaterials exhibit emergentmechanical properties as a result of their nanoarchitected, nanocomposite structures with optimized hierarchy, anisotropy, and nanoporosity. Fabrication of such complex systems is currently challenging because high-quality three-dimensional (3D) nanoprinting is mostly limited to simple, homogeneous materials. We report a strategy for the rapid nanoprinting of complex structural nanocomposites using metal nanoclusters. These ultrasmall, quantum-confined nanoclusters function as highly sensitive two-photon activators and simultaneously serve as precursors for mechanical reinforcements and nanoscale porogens. Nanocomposites with complex 3D architectures are printed, as well as structures with tunable, hierarchical, and anisotropic nanoporosity. Nanocluster-polymer nanolattices exhibit high specific strength, energy absorption, deformability, and recoverability. This framework provides a generalizable, versatile approach for the use of photoactive nanomaterials in additive manufacturing of complex systems with emergent mechanical properties.