金银合金纳米管的制备和吸收谱研究

Synthesis and Absorption Spectra of AuAg Alloyed Nanotubes

利用银纳米线作为模板,将其和四氯金酸进行电置换反应,制备得到了金银合金纳米管。紫外-可见吸收光谱分析表明,合金纳米管在500~800 nm光频范围内有强的等离子体吸收峰。此外,通过调整反应过程中银纳米线与四氯金酸的比例可改变纳米管的管壁厚度和合金中各元素组成比,进而可调控其吸收谱的特征。

A simple synthesis method is proposed, which can prepare Au Ag alloyed nanotubes simply by Ag nanowires as templates to react with chloroauric acid via Galvanic replacement reaction. The recorded UV-vis absorption spectra indicate that the synthesized alloy nanotubes present a strong absorption peak originating from surface plasmon resonance in the optical frequency range of 500~800 nm. Furthermore, by controlling the ratio of Ag nanowires solution to chloroauric acid, the wall thickness and elements ratio of the nanotube could be changed, thus resulting in tunable absorption spectra.