Nano Archive

Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents

Yu, Wei and Xie, Huaqing and Chen, Lifei and Li, Yang and Zhang, Chen (2009) Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents. Nanoscale Research Letters, 4 (5). pp. 465-470.

[img]
Preview
PDF
482Kb

Official URL: http://www.springerlink.com/content/uhq53163552613...

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 °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.

Item Type:Article
Uncontrolled Keywords:Chemical synthesis - Monodispersed - Copper colloid - Polyvinyl pyrrolidone
Subjects:Material Science > Nanochemistry
ID Code:4328
Deposited By:Lesley Tobin
Deposited On:24 Mar 2009 14:07
Last Modified:24 Mar 2009 14:07

Repository Staff Only: item control page