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使用结构简单的单温炉设备 ,通过三步升温热解二茂铁、三聚氰氨混合物方法 ,在二氧化硅、多晶陶瓷基底上分别合成了碳纳米管阵列、碳纳米管捆束 .使用扫描电子显微镜、透射电子显微镜、电子能量损失谱和x射线光电子能谱对合成样品进行了结构和成分分析 .结果显示 :两种基底上合成的纳米管均为多壁纯碳管 ;生长于光滑二氧化硅表面的碳纳米管具有高度取向性和一致的外径 ,长度为 10— 4 0 μm .碳纳米管采取催化剂顶端生长模式并展示出类杯状形貌 ;生长于粗糙多晶陶瓷表面的碳纳米管捆束随机取向 ,碳纳米管直径为 15— 80nm ,长度在几百微米 ,展示出类钟状和类穹状两种典型形貌 .讨论了基底表面形貌对碳纳米管形貌和结构的影响
Carbon nanotube arrays and carbon nanotube bundles were synthesized on silicon dioxide and polycrystalline ceramic substrates by a three-step thermal pyrolysis of ferrocene and melamine mixture using a simple single-temperature furnace equipment. Electron microscopy, transmission electron microscopy, electron energy loss spectroscopy and x-ray photoelectron spectroscopy were used to analyze the structure and composition of the synthesized samples. The results showed that the nanotubes synthesized on the two substrates were all multiwalled carbon nanotubes. Carbon nanotubes on the surface of silicon oxide have a high degree of orientation and a uniform outer diameter with a length of 10-400 μm. The carbon nanotubes take the catalyst top growth mode and exhibit a cup-like morphology; on the surface of the rough polycrystalline ceramic Carbon nanotubes bundles were randomly oriented with carbon nanotubes 15 to 80 nm in diameter and hundreds of micrometers in length, exhibiting two typical topographic appearances like bell-like and dome-like. The effects of substrate topography on the morphology of carbon nanotubes And the impact of the structure