Continuous synthesis of gold nanoparticles and nanoplates with controlled size and shape under UV irradiation
- 作者：Shengchun Yang ; Taiwei Zhang ; Lu Zhang ; Shixing Wang ; Zhimao Yang ; Bingjun Ding
- 关键词：Gold nanoparticles ; UV irradiation ; Nanoplates ; Continuous synthesis
- 刊名：Colloids and Surfaces A ; Physicochemical and Engineering Aspects
- 出版年：2007
- 期刊代码：22_09277757
- 类别：ch
- 出版时间：15 March 2007
- 卷：296
- 期：1-3
- 页码：37-44
- 文件大小：1917 K
摘要
Gold nanoparticles and nanoplates were synthesized through a continuous method under UV irradiation in the presence of citric acid and poly(vinylpyrrolidone) (PVP) at room temperature. Morphologies of obtained gold nanoparticles were mainly determined by experimental parameters, i.e., the concentration of PVP and the flow rate of solution. The spherical gold nanoparticles were synthesized at a higher solution flow rate (6 mL/min). The particle sizes evidently decreased from more than 10 to 2 nm with increasing concentration of PVP in solution. When PVP was absent in solution, gold nanoplates with obtuse triangle, hexagon and round shapes were synthesized under a lower solution flow rate, such as 0.5 mL/min.