用热丝化学气相沉积制备了碳纳米管,并用扫描电子显微镜和透射电子显微镜研究了它们的结构.结果表明,用CH4和H2为反应气体制备的碳纳米管是弯曲和中空的,它们的直径较大,生长速率较低;在反应气体中加入N2气后,碳纳米管的平均直径减小,生长速率增大,它们是准直的和竹节型的.分析和讨论了N2对碳纳米管生长和结构的影响.
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