Related Experiment Video
Updated: May 21, 2025

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices
Published on: October 6, 2020
Preparation and assembly of SiO2@TiO2 photoresponsive colloidal rings
Xiaoyu Pan1, Huaguang Wang1, Zexin Zhang1,2
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. hgwang@suda.edu.cn.
Abstract:
We report the synthesis of SiO2 colloidal rings coated with TiO2, which enable photoresponsive self-assembly into porous ordered structures and hybrid assembly for the capture and release of non-active colloids in a hydrogen peroxide (H2O2) solution. Such assemblies originate from a concentration gradient generated by the TiO2-mediated decomposition of H2O2 under ultraviolet (UV) irradiation. The work provides a straightforward strategy to fabricate active colloids with ring-like shapes for the controlled assembly of open crystalline colloidal materials.

