Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front
Self-Assembly of Charged Nanoparticles by an Autocatalytic Reaction Front
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DOI：
10.1021/acs.langmuir.5b03219
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发表时间：
2015-11-10
期刊：
影响因子：
3.9
通讯作者：
Lagzi, Istvan
中科院分区：
文献类型：
--
作者：
Bohner, Biborka;Schuszter, Gabor;Lagzi, Istvan
在这项工作中，我们提出的带电和pH敏感的纳米粒子的聚集可以时空控制的自主方式使用亚氯酸盐-连四硫酸盐自催化的前端，其中前端调节纳米粒子之间的静电相互作用，由于质子化的封端（羧基封端）配体。我们发现，聚集和沉淀的纳米粒子在液相中的自催化剂（H+）的可逆结合的效果在改变前的稳定性（混合长度）和速度的前线在这两种情况下，当前线向上和向下传播起着重要的作用。计算粒子间的相互作用（静电和货车德瓦尔斯）与测量的前端速度显示，聚集过程发生快速（在几秒钟内）在前面的位置。
In this work we present that aggregation of charged and pH sensitive nanoparticles can be spatiotemporally controlled by an autonomous way using the chlorite-tetrathionate autocatalytic front, where the front regulates the electrostatic interaction between nanoparticles due to protonation of the capping (carboxylate-terminated) ligand. We found that the aggregation and sedimentation of nanoparticles in liquid phase with the effect of reversible binding of the autocatalyst (H+) play important roles in changing the front stability (mixing length) and the velocity of the front in both cases when the fronts propagate upward and downward. Calculation of interparticle interactions (electrostatic and van der Waals) with the measurement of front velocity revealed that the aggregation process occurs fast (within a few seconds) at the front position.