Department of Chemical and Materials Engineering, Alberta Ingenuity Centre for Carbohydrate Science, University of Alberta, Edmonton, AB T6G 2G6, Canada.
Langmuir. 2011 Oct 18;27(20):12642-9. doi: 10.1021/la2025268. Epub 2011 Sep 15.
The development of new methods for the facile synthesis of hybrid nanomaterials is of great importance due to their importance in nanotechnology. In this work, we report a new method to deposit Au nanoparticles on the surface of single-walled carbon nanotubes (SWCNTs). Our approach consists of a one pot synthesis in which Au nanoparticles are generated in the presence of a photoreducing agent (Irgacure-2959) and carboxyl or polymer-functionalized SWCNTs (f-SWCNTs). We have observed that when carbon nanotubes are functionalized with polymers containing pendant amino groups, the latter can act as specific nucleation sites for well-dispersed deposition of Au nanoparticles. The surface coverage of the Au nanoparticles can be observed by transmission electron spectroscopy. These observations are compared to that of carboxyl functionalized SWCNTs, in which less surface coverage was observed. The f-SWCNT/Au nanocomposites were also characterized by UV-vis, infrared, and Raman spectroscopy and thermogravimetric analysis (TGA). This facile and effective route can be implemented to deposit gold nanoparticles on other surface-functionalized carbon nanotubes.
由于其在纳米技术中的重要性，开发用于简便合成杂化纳米材料的新方法非常重要。在这项工作中，我们报告了一种在光还原剂（Irgacure-2959）和羧基或聚合物功能化的单壁碳纳米管（f-SWCNTs）存在下将金纳米颗粒沉积在单壁碳纳米管（SWCNTs）表面上的新方法。我们已经观察到，当碳纳米管用含有悬垂氨基的聚合物官能化时，后者可以作为金纳米颗粒分散沉积的特定成核位点。通过透射电子光谱可以观察到金纳米颗粒的表面覆盖率。将这些观察结果与观察到的羧基官能化的 SWCNTs 进行了比较，观察到的表面覆盖率较低。还通过紫外可见光谱、红外光谱和拉曼光谱以及热重分析（TGA）对 f-SWCNT/Au 纳米复合材料进行了表征。这种简便有效的方法可以用于在其他表面功能化的碳纳米管上沉积金纳米颗粒。
