Ciambelli P, Sannino D, Sarno M, Fonseca A, Nagy J B
Department of Chemical and Food Engineering, University of Salerno, Fisciano (SA), Italy.
J Nanosci Nanotechnol. 2004 Sep;4(7):779-87. doi: 10.1166/jnn.2004.108.
Carbon nanotubes were synthesised within the pores of an alumina membrane. The membrane had 200 nm diameter pores and 60 microm thickness, and ethylene was used as carbon source. Membrane dissolution by HF results in a bundle of parallel open tubes, aligned without macroscopic defects. The external diameter of the tubes is uniform and there is no evidence of any amorphous carbon. Wall thickness control was obtained by varying the reaction time, length by the thickness of alumina membrane, and external tube diameter by the membrane pore size. Scanning (SEM) and transmission (TEM) electron microscopy, atomic force microscopy (AFM), X-ray diffraction, thermogravimetric analysis (TG) and surface area evaluation by nitrogen adsorption were used for the characterization of membrane and nanotubes.
碳纳米管在氧化铝膜的孔内合成。该膜具有直径为200纳米的孔和60微米的厚度，并且使用乙烯作为碳源。用氢氟酸溶解膜会得到一束平行的开口管，排列整齐且无宏观缺陷。管的外径均匀，没有任何无定形碳的迹象。通过改变反应时间来控制壁厚，通过氧化铝膜的厚度来控制长度，通过膜的孔径来控制管的外径。使用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、原子力显微镜（AFM）、X射线衍射、热重分析（TG）以及通过氮吸附进行表面积评估来对膜和纳米管进行表征。
