1] Department of Chemistry, Northwestern University, 2145 Sheridan Rd Evanston, Illinois 60208, USA [2] International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Rd Evanston, Illinois 60208, USA.
1] International Institute of Nanotechnology, Northwestern University, 2145 Sheridan Rd Evanston, Illinois 60208, USA [2] Department of Materials Science and Engineering, Northwestern University, 2220 Campus Dr Evanston, Illinois 60208, USA.
Nat Mater. 2015 Aug;14(8):833-9. doi: 10.1038/nmat4293. Epub 2015 May 25.
Whether two species will co-crystallize depends on the chemical, physical and structural complementarity of the interacting components. Here, by using DNA as a surface ligand, we selectively co-crystallize mixtures of two different anisotropic nanoparticles and systematically investigate the effects of nanoparticle size and shape complementarity on the resultant crystal symmetry, microstrain, and effective 'DNA bond' length and strength. We then use these results to understand a more complicated system where both size and shape complementarity change, and where one nanoparticle can participate in multiple types of directional interactions. Our findings offer improved control of non-spherical nanoparticles as building blocks for the assembly of sophisticated macroscopic materials, and provide a framework to understand complementarity and directional interactions in DNA-mediated nanoparticle crystallization.
两种物质是否共结晶取决于相互作用成分的化学、物理和结构互补性。在这里，我们使用 DNA 作为表面配体，有选择性地共结晶两种不同各向异性纳米粒子的混合物，并系统地研究纳米粒子大小和形状互补性对所得晶体对称性、微应变以及有效“DNA 键”长度和强度的影响。然后，我们利用这些结果来理解一个更为复杂的系统，其中大小和形状互补性都发生变化，并且一个纳米粒子可以参与多种类型的定向相互作用。我们的发现为控制非球形纳米粒子作为组装复杂宏观材料的构建块提供了更好的方法，并为理解 DNA 介导的纳米粒子结晶中的互补性和定向相互作用提供了框架。
