为了合理有效控制碳纳米管(CNTs)的管径,比较研究了化学气相沉积(CVD)-模板法与CVD-中毒法.通过透射电镜(TEM)观察碳纳米管形貌及其管径尺寸,分析了不同条件下,碳纳米管的形貌差异,讨论了制备阳极氧化铝(AAO)膜的氧化电压对碳纳米管的管径、管的有序度的影响和碳酸钠毒物对碳纳米管的管径、管形、产率的影响,并且分析了两种制备方法的生长机理.结果表明,在CVD-模板法中,在一定范围内,电压升高可以使AAO膜孔增大,从而控制碳纳米管的外径;在CVD-中毒法中,微量的碳酸钠粉末能增大碳纳米管的内径.
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