The structure evolution of colloidal aggregates composed of monodisperse silica nanospheres.
The structure evolution of colloidal aggregates composed of monodisperse silica nanospheres.
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DOI：
10.1016/j.jcis.2017.05.010
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发表时间：
2017-09
影响因子：
9.9
通讯作者：
Wei Sun;Sheng-Li Chen;Huili Zhu;Mingri Xu;Ai-jun Wang
中科院分区：
文献类型：
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作者：
Wei Sun;Sheng-Li Chen;Huili Zhu;Mingri Xu;Ai-jun Wang
将不同数量的单分散二氧化硅纳米球自组装在超声分散二氧化硅纳米球悬浮液形成的油包水乳状液滴中，制备出具有多面体几何形状的高阶团簇、具有中间排列顺序的超粒子、具有面心立方排列顺序的不同内部结构的超球等胶体聚集体。本文研究了胶体聚集体的结构演变与组成二氧化硅纳米球数量的关系。研究发现，在不同的溶剂中，随着组成二氧化硅纳米球数量的增加，胶体聚集体的内部结构会发生变化。以正辛醇为溶剂时，超颗粒为高阶团簇向中空超球的过渡结构，而在硅油中，超颗粒为高阶团簇向固体超球的过渡结构。
In this work, colloidal aggregates, such as higher-order clusters with polyhedral geometry, supraparticles with intermediate packing ordering, different inner structured supraballs with face-centered cubic ordering were produced through self-assembly of different quantities of monodisperse silica nanospheres in water-in-oil emulsion droplets which were formed by ultrasonic dispersion of silica nanospheres suspension into different solvents. The structure evolution of colloidal aggregates as a function of the number of constituent silica nanospheres was studied in this article. It was found that the inner structures of colloidal aggregates would be changed with increasing of the number of constituent silica nanospheres in different solvents. In the case ofn-octanol being as solvent, the supraparticles were the transition structure for higher-order clusters into supraballs with hollow structure, while in silicone oil, the supraparticles were the transition structure for higher-order clusters into solid structured supraballs.