Kitching H, Kenyon A J, Parkin I P
UCL, Chemistry, London, UK.
Phys Chem Chem Phys. 2014 Apr 7;16(13):6050-9. doi: 10.1039/c3cp55366c.
We describe the synthesis of charge-stabilised gold and silver nanoparticles by a modified Turkevich method and their interaction with a selection of cationic and anionic dyes. It was found that gold nanoparticles interact strongly with cationic dyes and in some cases enhanced absorption was observed by UV-visible spectroscopy. It is also shown that addition of cationic dyes to gold nanoparticles triggers aggregation of the nanoparticles into large, micrometre-scale clusters. Simultaneous fragmentation and agglomeration of the gold nanoparticles was observed at high concentrations of cationic dye in the solution. These effects were not observed when gold nanoparticles were mixed with anionic dyes, nor for silver nanoparticles with either cationic or anionic dyes.
我们描述了通过改良的特克维奇方法合成电荷稳定的金和银纳米颗粒，以及它们与一系列阳离子和阴离子染料的相互作用。结果发现，金纳米颗粒与阳离子染料强烈相互作用，在某些情况下，通过紫外可见光谱观察到吸收增强。还表明，向金纳米颗粒中添加阳离子染料会触发纳米颗粒聚集成大的微米级团簇。在溶液中阳离子染料浓度较高时，观察到金纳米颗粒同时发生破碎和团聚。当金纳米颗粒与阴离子染料混合时，以及银纳米颗粒与阳离子或阴离子染料混合时，均未观察到这些效应。
