Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.
Science. 2011 Oct 14;334(6053):204-8. doi: 10.1126/science.1210493.
A current limitation in nanoparticle superlattice engineering is that the identities of the particles being assembled often determine the structures that can be synthesized. Therefore, specific crystallographic symmetries or lattice parameters can only be achieved using specific nanoparticles as building blocks (and vice versa). We present six design rules that can be used to deliberately prepare nine distinct colloidal crystal structures, with control over lattice parameters on the 25- to 150-nanometer length scale. These design rules outline a strategy to independently adjust each of the relevant crystallographic parameters, including particle size (5 to 60 nanometers), periodicity, and interparticle distance. As such, this work represents an advance in synthesizing tailorable macroscale architectures comprising nanoscale materials in a predictable fashion.
当前，在纳米粒子超晶格工程领域存在一个局限，即组装的粒子种类往往决定了可合成的结构。因此，只有使用特定的纳米粒子作为构建块才能实现特定的晶体对称性或晶格参数（反之亦然）。我们提出了六个设计规则，可以用来有目的地制备九种不同的胶体晶体结构，并且可以在 25 到 150 纳米的长度范围内控制晶格参数。这些设计规则概述了一种策略，可以独立地调整相关的晶体学参数，包括粒径（5 到 60 纳米）、周期性和颗粒间距离。因此，这项工作在以可预测的方式合成由纳米材料组成的可定制的宏观结构方面取得了进展。
