Liesegang Rings Engineered from Charged Nanoparticles
Liesegang Rings Engineered from Charged Nanoparticles
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DOI：
10.1021/ja906890v
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发表时间：
2010-01-13
影响因子：
15
通讯作者：
Grzybowski, Bartosz A.
中科院分区：
文献类型：
--
作者：
Lagzi, Istvan;Kowalczyk, Bartlomiej;Grzybowski, Bartosz A.
功能化纳米粒子（NPs）作为自组织化学模式的基石，包括纳米粒子沉淀的周期性区域。离子是大多数形成模式的化学系统的基础，其性质不能轻易改变，与之相反，NPs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了析出行为，并最终控制了新兴图案的形态。反应扩散模型解释了基于NPs的周期性沉淀现象，并可用于不同粒径NPs的分馏。
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 ernerging 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.