Latest Article
Synthesis of Uniform Silver Nanoparticles by a Microwave Method in Polyethylene Glycol with the Assistant of Polyvinylpyrrolidone
ZHU Jie, SHI Junjun, PAN Yueyue, LIU Xiaoli, ZHOU Li†
School of Physics and Technology, Wuhan University, Wuhan 430072, Hubei, China
 We described a method for the rapid synthesis of uni- form silver nanoparticles (NPs) under microwave heating, using poly(ethylene glycol) (PEG) as reducing agent and solvent and poly(vinylpyrrolidinone) (PVP) as capping agent. The transmis- sion electron microscopy (TEM) and UV-Vis extinction spectra were used to characterize the size and uniformity of the silver NPs. At the same reaction temperature, the products with microwave heating were more uniform than that with oil heating. We also investigated the influence of reaction temperature, microwave power, and molar ratio of PVP to AgNO3. In our experiments, uniform silver NPs with mean diameter of 50 nm were synthesized at 140 ℃ under 700 W microwave irradiation with PVP/AgNO3 molar ratio of 5︰1. 
Key words: microwave synthesis; silver NPs; UV-Vis extinction; uniformity
CLC number: O 611.4; O 614.122
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