Programming Colloidal Crystal Habit with Anisotropic Nanoparticle Building Blocks and DNA Bonds,Journal of the American Chemical Society

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Programming Colloidal Crystal Habit with Anisotropic Nanoparticle Building Blocks and DNA Bonds
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2016-10-28 , DOI: 10.1021/jacs.6b09704
Matthew N. O’Brien ₁ , Hai-Xin Lin ₁ , Martin Girard ₂ , Monica Olvera de la Cruz _{1,

2} , Chad A. Mirkin _{1,

2}

Affiliation

Colloidal crystallization can be programmed using building blocks consisting of a nanoparticle core and DNA bonds to form materials with controlled crystal symmetry, lattice parameters, stoichiometry, and dimensionality. Despite this diversity of colloidal crystal structures, only spherical nanoparticles crystallized with BCC symmetry experimentally yield single crystals with well-defined crystal habits. Here, we use low-symmetry, anisotropic nanoparticles to overcome this limitation and to access single crystals with different equilibrium Wulff shapes: a cubic habit from cube-shaped nanoparticles, a rhombic dodecahedron habit from octahedron-shaped nanoparticles, and an octahedron habit from rhombic dodecahedron-shaped nanoparticles. The observation that one can control the microscopic shape of single crystals based upon control of particle building block and crystal symmetry has important fundamental and technological implications for this novel class of colloidal matter.

中文翻译：

用各向异性纳米粒子构建块和 DNA 键编程胶体晶体习性

胶体结晶可以使用由纳米粒子核心和 DNA 键组成的构建块进行编程，以形成具有受控晶体对称性、晶格参数、化学计量和维数的材料。尽管胶体晶体结构存在这种多样性，但只有以 BCC 对称性结晶的球形纳米粒子在实验上会产生具有明确晶体习性的单晶。在这里，我们使用低对称性、各向异性纳米粒子来克服这一限制并获得具有不同平衡伍尔夫形状的单晶：立方形纳米粒子的立方习性、八面体形纳米粒子的菱形十二面体习性和菱形的八面体习性。十二面体形状的纳米粒子。

更新日期：2016-10-28

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