金属基底上碳纳米管束的大面积制备

Production of Large Area Carbon Nanotube Bundles on Metal Substrate

采用化学气相沉积法(CVD),以二甲苯为碳源,二茂铁为催化剂,以沉积Al膜过渡层的不锈钢为基底,经过HF处理后,大面积合成了一种碳纳米管束状结构。使用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和拉曼光谱(Raman)对样品形貌和结构进行表征。结果显示:合成的碳纳米管束直径为15￣25μm,长度超过500μm,每根管束由大量直径为30￣80nm的多壁碳纳米管组成,这些碳纳米管沿管束轴线方向密实排列并相互缠绕,预示着具有较强的机械强度。结合实验对其形成机制进行了初步探讨。

Macroscopic carbon nanotube （CNT） bundles were synthesized on stainless steel position （CVD）. Xylene was used as the carbon source and ferroeene as the catalyst. by chemical vapor deScanning electron microscopy （SEM）, transmission electron microscopy （TEM） and Raman analysis were used to evaluate the morphological and the structural features. The diameters of the bundles are about 15-25 μm and their length over 500 μm in 30 min. The bundles are composed of aligned multi-walled carbon nanotubes（MWNTs） and the CNTs in each bundle are closely compact and parallel to each other along the direction of the bundle axis, implying high mechanical strength of these bundles. The aligned CNTs can only self-organize into arrays of macroscopic bundles on the Al buffer layer with HF treatment. The possible formation mechanism of bundles is discussed.