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Updated: Jun 11, 2026

Synthesis and Characterization of Supramolecular Colloids
Published on: April 22, 2016
Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents
Wei Yu1, Huaqing Xie, Lifei Chen
1School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209 China.
Abstract:
A chemical reduction method for preparing monodispersed pure-phase copper colloids in water and ethylene glycol has been reported. Owing to the reduction property of ethylene glycol, the reaction rate in ethylene glycol is higher than that in water. In addition, the amount of reducing agent can be reduced largely. Ascorbic acid plays roles as reducing agent and antioxidant of colloidal copper, due to its ability to scavenge free radicals and reactive oxygen molecules. Thermogravimetric results reveal that the as-prepared copper nanoparticles have good stability, and they begin to be oxidized at above 210 degrees C. Polyvinyl pyrrolidone works both as size controller and polymeric capping agents, because it hinders the nuclei from aggregation through the polar groups, which strongly absorb the copper particles on the surface with coordination bonds.
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