Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/93001
Title: A simple and effective chemical route for the preparation of uniform nonaqueous gold colloids
Authors: Han, M.Y. 
Quek, C.H. 
Huang, W. 
Chew, C.H. 
Gan, L.M. 
Issue Date: 1999
Source: Han, M.Y.,Quek, C.H.,Huang, W.,Chew, C.H.,Gan, L.M. (1999). A simple and effective chemical route for the preparation of uniform nonaqueous gold colloids. Chemistry of Materials 11 (4) : 1144-1147. ScholarBank@NUS Repository.
Abstract: In this paper, we report a simple and clean method of producing uniform nonaqueous gold colloids by the chemical reduction of chloroauric acid (HAuCl4) using the oxygen-free organic supporting medium formamide itself as reducing agent in the presence of the stabilizer poly(vinylpyrrolidone) (PVP). The reduction of HAuCl4 can take place easily at room temperature in the new reducing system without introducing foreign reducing agents. A two-step reaction process to gold particles was suggested from the kinetics analysis for the formation of gold colloids in formamide systems. The difference in the production of gold particles in formamide solution from the established route in aqueous solution was also depicted. This new and effective chemical route also provides an alternative method to produce other uniform transition-metal particles in nonaqueous solvents. © 1999 American Chemical Society.
Source Title: Chemistry of Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/93001
ISSN: 08974756
Appears in Collections:Staff Publications

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