杰纳斯
杰纳斯粒子
聚苯乙烯
壳体(结构)
胶体
粒子(生态学)
肿胀 的
材料科学
制作
纳米颗粒
球体
对称性破坏
纳米技术
对称(几何)
化学物理
化学工程
聚合物
复合材料
化学
物理
几何学
替代医学
天文
海洋学
医学
量子力学
病理
数学
工程类
地质学
作者
Jichuan Qiu,Zitao Chen,Miaofang Chi,Younan Xia
标识
DOI:10.1002/anie.202102164
摘要
Abstract Janus particles are widely sought for applications related to colloidal assembly, stabilization of emulsions, and development of active colloids, among others. Here we report a versatile route to the fabrication of well‐controlled Janus particles by simply breaking the symmetry of spherical particles with swelling. When a polystyrene (PS) sphere covered by a rigid shell made of silica or polydopamine is exposed to a good solvent for PS, a gradually increased pressure will be created inside the shell. If the pressure becomes high enough to poke a hole in the shell, the spherical symmetry will break while pushing out the swollen PS through the opening to generate a Janus particle comprised of two distinct components. One of the components is made of PS and its size is controlled by the extent of swelling. The other component is comprised of the rigid shell and remaining PS, with its overall diameter determined by the original PS sphere and the rigid shell. This solution‐based route holds promises for the scalable production of complex Janus particles with a variety of compositions and in large quantities.
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