Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
J Am Chem Soc. 2010 Jan 13;132(1):58-60. doi: 10.1021/ja906890v.
Functionalized nanoparticles (NPs) serve as building blocks of self-organizing chemical patterns comprising periodic zones of nanoparticle precipitation. In contrast to ions, which underlie most pattern-forming chemical systems and whose properties cannot be readily modified, NPs allow for flexible adjustment of particle charges and/or material properties. In particular, changes in the particle charges control the precipitation behavior and ultimately the morphologies of the emerging patterns. The phenomenon of NP-based periodic precipitation is explained by reaction-diffusion modeling and can be used for the fractionation of NPs of different sizes.
功能化纳米粒子 (NPs) 可作为自组织化学图案的构建块，这些图案由纳米粒子沉淀的周期性区域组成。与构成大多数图案形成化学系统的离子不同，离子的性质不能轻易改变，而 NPs 则允许灵活调整粒子电荷和/或材料性质。特别是，粒子电荷的变化控制着沉淀行为，并最终控制着新兴图案的形态。基于 NP 的周期性沉淀现象可以通过反应-扩散模型来解释，并可用于不同尺寸的 NP 的分级分离。
