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提出了一个有效的、以晶种媒介的光化学法可控生长不同尺寸的胶体金纳米粒子在多壁碳纳米管(MWNTs)表面的自组装.方法基于羧基化的MWNTs以双官能团巯基乙酸分子化学修饰而连接上巯基,随后,不同尺寸的胶体金纳米粒子以共价结合的方式分别被直接锚定在其表面,从而获得良好的Au/MWNTs杂化材料.通过UV-Vis光谱、TEM和XRS等技术对胶体金纳米粒子、Au/MWNTs复合物及其自组装过程的表征,详细研究了金纳米粒子尺寸对功能化MWNTs表面自组装的影响,结果表明,直径为2.5～5.2nm范围很好分散的金纳米粒子能够很好自组装在平均直径约20nm的功能化MWNTs表面上.同时探讨了双官能团分子的化学修饰和金纳米粒子对MWNTs表面自组装的驱动力。
An effective photocatalytic growth-controlled self-assembly of colloidal gold nanoparticles with different sizes on multi-walled carbon nanotubes (MWNTs) was proposed by the photochemical method of seed medium.Methods Based on the carboxylated MWNTs, the bifunctional thioglycolic acid Modified and connected to the thiol group, then different sizes of colloidal gold nanoparticles covalently bonded to the surface were directly anchored to obtain good Au / MWNTs hybrid material by UV-Vis spectroscopy, TEM and XRS The effects of gold nanoparticle size on the surface self-assembly of functionalized MWNTs were investigated in detail. The results show that the diameter of 2.5-5.2 nm is very good Dispersed gold nanoparticles can self-assemble on the surface of functionalized MWNTs with an average diameter of about 20nm, and the chemical modification of bifunctional molecules and the driving force of gold nanoparticles on the surface self-assembly of MWNTs were also discussed.