Related Experiment Video
Updated: Sep 21, 2025

Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
Core-Shell SiO2-PS Colloids with Controlled Eccentric Ratio
1State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Abstract:
Precisely controlling microstructure of colloidal particles is crucial for their applications. Core-shell colloids have been extensively synthesized and used in past decades. However, controlling the location of cores in core-shell particles remains a challenge. To address this problem we explored the synthesis of SiO2-PS core-shell colloids by using a simple system containing only core particles, monomer, initiator, and water/ethanol and found the increase of ethanol/water ratio can induce a structure transition sequence from eccentric to concentric to eccentric to concentric to eccentric. Furthermore, we illustrate that the eccentric ratios of SiO2-PS core-shell colloids, that is, the location of SiO2 cores in the whole particles, can be precisely controlled by a two-step polymerization procedure. It is anticipated that our results can widen the application of core-shell colloids, especially after the introduction of functionality for core or shell materials.
More Related Videos
Related Concept Videos
Colloidal precipitates
Colloids and Suspensions
Colloids
Pore Size Distribution
Adequate...
Coagulation
Precipitate Formation and Particle Size Control
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...

