Acta Phys. -Chim. Sin. ›› 2006, Vol. 22 ›› Issue (04): 513-516.doi: 10.3866/PKU.WHXB20060424

• Note • Previous Articles    

Studies on Au Colloidal Nanoparticles Synthesized by Microwave Irradiation

YANG Li-Ping;TU Wei-Xia   

  1. Key Laboratory for Nanomaterials of Ministry of Education, Division of Moleoular and Materials Simulation, Department of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
  • Received:2005-09-19 Revised:2005-11-16 Published:2006-04-10
  • Contact: TU, Wei-Xia E-mail:tuwx@mail.buct.edu.cn

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Abstract: Polymer-stabilized Au colloidal nanoparticles were prepared by microwave irradiation. Size of the Au particles varied from 5 nm to 120 nm along with different reactive conditions. Effects of the alcohol reducing agent and NaOH on particle size and shape were investigated. The prepared Au nanoparticles were characterized by transmission electron microscope (TEM) and ultraviolet-visible (UV-Vis) spectrophotometer. The Au nanoparticles prepared by microware irradiation have small particle size and good size distribution. The nanoparticle size and shape are highly dependent on the nature of the reducing agent and concentration of NaOH. Using UV-Vis spectra, it was found that the velocity of the formation of the Au nanoparticles in the reactive system with adding of NaOH was obviously faster and easier to form spherical particles than that without NaOH.

Key words: Microwave irradiation:Nanoparticle, Au colloid:Poly(1-vinylpyrrolidone)