Diamond family of nanoparticle superlattices.
Diamond family of nanoparticle superlattices.
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纳米颗粒超晶格的钻石家族。
DOI：
10.1126/science.aad2080
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发表时间：
2016-02-05
期刊：
影响因子：
--
通讯作者：
Gang O
中科院分区：
文献类型：
--
作者：
Liu W;Tagawa M;Xin HL;Wang T;Emamy H;Li H;Yager KG;Starr FW;Tkachenko AV;Gang O
由原子或胶体元素形成的金刚石晶格具有显著的功能特性。然而，由于填料含量低、对键取向敏感以及局部非均质性，通过自组装来构建这种结构具有挑战性。我们报告了一种通过自组装来创建纳米物体的金刚石超晶格的策略，并通过组装两个不同的金刚石晶格来演示其实验实现，一个有一个没有原子类似物。我们的方法依赖于具有良好定义的四价结合拓扑的各向异性粒子和各向同性粒子之间的关联。截断四面体在球面上的三角束缚足迹的约束填充定义了一个独特的三维晶格。因此，金刚石自组装问题是通过其映射到各向同性球形粒子表面的二维三角形填料来解决的。
Diamond lattices formed by atomic or colloidal elements exhibit remarkable functional properties. However, building such structures via self-assembly has proven to be challenging due to the low packing fraction, sensitivity to bond orientation, and local heterogeneity. We report a strategy for creating a diamond superlattice of nano-objects via self-assembly, and demonstrate its experimental realization by assembling two variant diamond lattices, one with and one without atomic analogs. Our approach relies on the association between anisotropic particles with well-defined tetravalent binding topology and isotropic particles. The constrained packing of triangular binding footprints of truncated tetrahedra on a sphere defines a unique three-dimensional lattice. Hence, the diamond self-assembly problem is solved via its mapping onto two-dimensional triangular packing on the surface of isotropic spherical particles.